20120240

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1$

素因数の和:131

約数の個数: 160

約数和(自身を含む): 59043840

約数和(自身を除く): 38923600

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 19, 20, 28, 31, 35, 38, 40, 56, 61, 62, 70, 76, 80, 95, 112, 122, 124, 133, 140, 152, 155, 190, 217, 244, 248, 266, 280, 304, 305, 310, 380, 427, 434, 488, 496, 532, 560, 589, 610, 620, 665, 760, 854, 868, 976, 1064, 1085, 1159, 1178, 1220, 1240, 1330, 1520, 1708, 1736, 1891, 2128, 2135, 2170, 2318, 2356, 2440, 2480, 2660, 2945, 3416, 3472, 3782, 4123, 4270, 4340, 4636, 4712, 4880, 5320, 5795, 5890, 6832, 7564, 8113, 8246, 8540, 8680, 9272, 9424, 9455, 10640, 11590, 11780, 13237, 15128, 16226, 16492, 17080, 17360, 18544, 18910, 20615, 23180, 23560, 26474, 30256, 32452, 32984, 34160, 35929, 37820, 40565, 41230, 46360, 47120, 52948, 64904, 65968, 66185, 71858, 75640, 81130, 82460, 92720, 105896, 129808, 132370, 143716, 151280, 162260, 164920, 179645, 211792, 251503, 264740, 287432, 324520, 329840, 359290, 503006, 529480, 574864, 649040, 718580, 1006012, 1058960, 1257515, 1437160, 2012024, 2515030, 2874320, 4024048, 5030060, 10060120, 20120240]

約数ペア:

[(1, 20120240), (2, 10060120), (4, 5030060), (5, 4024048), (7, 2874320), (8, 2515030), (10, 2012024), (14, 1437160), (16, 1257515), (19, 1058960), (20, 1006012), (28, 718580), (31, 649040), (35, 574864), (38, 529480), (40, 503006), (56, 359290), (61, 329840), (62, 324520), (70, 287432), (76, 264740), (80, 251503), (95, 211792), (112, 179645), (122, 164920), (124, 162260), (133, 151280), (140, 143716), (152, 132370), (155, 129808), (190, 105896), (217, 92720), (244, 82460), (248, 81130), (266, 75640), (280, 71858), (304, 66185), (305, 65968), (310, 64904), (380, 52948), (427, 47120), (434, 46360), (488, 41230), (496, 40565), (532, 37820), (560, 35929), (589, 34160), (610, 32984), (620, 32452), (665, 30256), (760, 26474), (854, 23560), (868, 23180), (976, 20615), (1064, 18910), (1085, 18544), (1159, 17360), (1178, 17080), (1220, 16492), (1240, 16226), (1330, 15128), (1520, 13237), (1708, 11780), (1736, 11590), (1891, 10640), (2128, 9455), (2135, 9424), (2170, 9272), (2318, 8680), (2356, 8540), (2440, 8246), (2480, 8113), (2660, 7564), (2945, 6832), (3416, 5890), (3472, 5795), (3782, 5320), (4123, 4880), (4270, 4712), (4340, 4636)]