256649640

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^2\times {\mathrm{311}}^1$

素因数の和:384

約数の個数: 192

約数和(自身を含む): 869581440

約数和(自身を除く): 612931800

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 20, 23, 24, 26, 30, 39, 40, 46, 52, 60, 65, 69, 78, 92, 104, 115, 120, 130, 138, 156, 184, 195, 230, 260, 276, 299, 311, 312, 345, 390, 460, 520, 529, 552, 598, 622, 690, 780, 897, 920, 933, 1058, 1196, 1244, 1380, 1495, 1555, 1560, 1587, 1794, 1866, 2116, 2392, 2488, 2645, 2760, 2990, 3110, 3174, 3588, 3732, 4043, 4232, 4485, 4665, 5290, 5980, 6220, 6348, 6877, 7153, 7176, 7464, 7935, 8086, 8970, 9330, 10580, 11960, 12129, 12440, 12696, 13754, 14306, 15870, 16172, 17940, 18660, 20215, 20631, 21160, 21459, 24258, 27508, 28612, 31740, 32344, 34385, 35765, 35880, 37320, 40430, 41262, 42918, 48516, 55016, 57224, 60645, 63480, 68770, 71530, 80860, 82524, 85836, 92989, 97032, 103155, 107295, 121290, 137540, 143060, 161720, 164519, 165048, 171672, 185978, 206310, 214590, 242580, 275080, 278967, 286120, 329038, 371956, 412620, 429180, 464945, 485160, 493557, 557934, 658076, 743912, 822595, 825240, 858360, 929890, 987114, 1115868, 1316152, 1394835, 1645190, 1859780, 1974228, 2138747, 2231736, 2467785, 2789670, 3290380, 3719560, 3948456, 4277494, 4935570, 5579340, 6416241, 6580760, 8554988, 9871140, 10693735, 11158680, 12832482, 17109976, 19742280, 21387470, 25664964, 32081205, 42774940, 51329928, 64162410, 85549880, 128324820, 256649640]

約数ペア:

[(1, 256649640), (2, 128324820), (3, 85549880), (4, 64162410), (5, 51329928), (6, 42774940), (8, 32081205), (10, 25664964), (12, 21387470), (13, 19742280), (15, 17109976), (20, 12832482), (23, 11158680), (24, 10693735), (26, 9871140), (30, 8554988), (39, 6580760), (40, 6416241), (46, 5579340), (52, 4935570), (60, 4277494), (65, 3948456), (69, 3719560), (78, 3290380), (92, 2789670), (104, 2467785), (115, 2231736), (120, 2138747), (130, 1974228), (138, 1859780), (156, 1645190), (184, 1394835), (195, 1316152), (230, 1115868), (260, 987114), (276, 929890), (299, 858360), (311, 825240), (312, 822595), (345, 743912), (390, 658076), (460, 557934), (520, 493557), (529, 485160), (552, 464945), (598, 429180), (622, 412620), (690, 371956), (780, 329038), (897, 286120), (920, 278967), (933, 275080), (1058, 242580), (1196, 214590), (1244, 206310), (1380, 185978), (1495, 171672), (1555, 165048), (1560, 164519), (1587, 161720), (1794, 143060), (1866, 137540), (2116, 121290), (2392, 107295), (2488, 103155), (2645, 97032), (2760, 92989), (2990, 85836), (3110, 82524), (3174, 80860), (3588, 71530), (3732, 68770), (4043, 63480), (4232, 60645), (4485, 57224), (4665, 55016), (5290, 48516), (5980, 42918), (6220, 41262), (6348, 40430), (6877, 37320), (7153, 35880), (7176, 35765), (7464, 34385), (7935, 32344), (8086, 31740), (8970, 28612), (9330, 27508), (10580, 24258), (11960, 21459), (12129, 21160), (12440, 20631), (12696, 20215), (13754, 18660), (14306, 17940), (15870, 16172)]