20328812500

素因数分解:

$2^2\times 5^6\times {\mathrm{17}}^1\times {\mathrm{19}}^2\times {\mathrm{53}}^1$

素因数の和:142

約数の個数: 252

約数和(自身を含む): 50630680044

約数和(自身を除く): 30301867544

約数列:

[1, 2, 4, 5, 10, 17, 19, 20, 25, 34, 38, 50, 53, 68, 76, 85, 95, 100, 106, 125, 170, 190, 212, 250, 265, 323, 340, 361, 380, 425, 475, 500, 530, 625, 646, 722, 850, 901, 950, 1007, 1060, 1250, 1292, 1325, 1444, 1615, 1700, 1802, 1805, 1900, 2014, 2125, 2375, 2500, 2650, 3125, 3230, 3604, 3610, 4028, 4250, 4505, 4750, 5035, 5300, 6137, 6250, 6460, 6625, 7220, 8075, 8500, 9010, 9025, 9500, 10070, 10625, 11875, 12274, 12500, 13250, 15625, 16150, 17119, 18020, 18050, 19133, 20140, 21250, 22525, 23750, 24548, 25175, 26500, 30685, 31250, 32300, 33125, 34238, 36100, 38266, 40375, 42500, 45050, 45125, 47500, 50350, 53125, 59375, 61370, 62500, 66250, 68476, 76532, 80750, 85595, 90100, 90250, 95665, 100700, 106250, 112625, 118750, 122740, 125875, 132500, 153425, 161500, 165625, 171190, 180500, 191330, 201875, 212500, 225250, 225625, 237500, 251750, 265625, 296875, 306850, 325261, 331250, 342380, 382660, 403750, 427975, 450500, 451250, 478325, 503500, 531250, 563125, 593750, 613700, 629375, 650522, 662500, 767125, 807500, 828125, 855950, 902500, 956650, 1009375, 1062500, 1126250, 1128125, 1187500, 1258750, 1301044, 1534250, 1626305, 1656250, 1711900, 1913300, 2018750, 2139875, 2252500, 2256250, 2391625, 2517500, 2815625, 3068500, 3146875, 3252610, 3312500, 3835625, 4037500, 4279750, 4512500, 4783250, 5046875, 5631250, 5640625, 6293750, 6505220, 7671250, 8131525, 8559500, 9566500, 10093750, 10699375, 11262500, 11281250, 11958125, 12587500, 14078125, 15342500, 15734375, 16263050, 19178125, 20187500, 21398750, 22562500, 23916250, 28156250, 31468750, 32526100, 38356250, 40657625, 42797500, 47832500, 53496875, 56312500, 59790625, 62937500, 76712500, 81315250, 95890625, 106993750, 119581250, 162630500, 191781250, 203288125, 213987500, 239162500, 267484375, 298953125, 383562500, 406576250, 534968750, 597906250, 813152500, 1016440625, 1069937500, 1195812500, 2032881250, 4065762500, 5082203125, 10164406250, 20328812500]

約数ペア:

[(1, 20328812500), (2, 10164406250), (4, 5082203125), (5, 4065762500), (10, 2032881250), (17, 1195812500), (19, 1069937500), (20, 1016440625), (25, 813152500), (34, 597906250), (38, 534968750), (50, 406576250), (53, 383562500), (68, 298953125), (76, 267484375), (85, 239162500), (95, 213987500), (100, 203288125), (106, 191781250), (125, 162630500), (170, 119581250), (190, 106993750), (212, 95890625), (250, 81315250), (265, 76712500), (323, 62937500), (340, 59790625), (361, 56312500), (380, 53496875), (425, 47832500), (475, 42797500), (500, 40657625), (530, 38356250), (625, 32526100), (646, 31468750), (722, 28156250), (850, 23916250), (901, 22562500), (950, 21398750), (1007, 20187500), (1060, 19178125), (1250, 16263050), (1292, 15734375), (1325, 15342500), (1444, 14078125), (1615, 12587500), (1700, 11958125), (1802, 11281250), (1805, 11262500), (1900, 10699375), (2014, 10093750), (2125, 9566500), (2375, 8559500), (2500, 8131525), (2650, 7671250), (3125, 6505220), (3230, 6293750), (3604, 5640625), (3610, 5631250), (4028, 5046875), (4250, 4783250), (4505, 4512500), (4750, 4279750), (5035, 4037500), (5300, 3835625), (6137, 3312500), (6250, 3252610), (6460, 3146875), (6625, 3068500), (7220, 2815625), (8075, 2517500), (8500, 2391625), (9010, 2256250), (9025, 2252500), (9500, 2139875), (10070, 2018750), (10625, 1913300), (11875, 1711900), (12274, 1656250), (12500, 1626305), (13250, 1534250), (15625, 1301044), (16150, 1258750), (17119, 1187500), (18020, 1128125), (18050, 1126250), (19133, 1062500), (20140, 1009375), (21250, 956650), (22525, 902500), (23750, 855950), (24548, 828125), (25175, 807500), (26500, 767125), (30685, 662500), (31250, 650522), (32300, 629375), (33125, 613700), (34238, 593750), (36100, 563125), (38266, 531250), (40375, 503500), (42500, 478325), (45050, 451250), (45125, 450500), (47500, 427975), (50350, 403750), (53125, 382660), (59375, 342380), (61370, 331250), (62500, 325261), (66250, 306850), (68476, 296875), (76532, 265625), (80750, 251750), (85595, 237500), (90100, 225625), (90250, 225250), (95665, 212500), (100700, 201875), (106250, 191330), (112625, 180500), (118750, 171190), (122740, 165625), (125875, 161500), (132500, 153425)]