256661020

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{821}}^1$

素因数の和:884

約数の個数: 144

約数和(自身を含む): 708432480

約数和(自身を除く): 451771460

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 29, 35, 44, 49, 55, 58, 70, 77, 98, 110, 116, 140, 145, 154, 196, 203, 220, 245, 290, 308, 319, 385, 406, 490, 539, 580, 638, 770, 812, 821, 980, 1015, 1078, 1276, 1421, 1540, 1595, 1642, 2030, 2156, 2233, 2695, 2842, 3190, 3284, 4060, 4105, 4466, 5390, 5684, 5747, 6380, 7105, 8210, 8932, 9031, 10780, 11165, 11494, 14210, 15631, 16420, 18062, 22330, 22988, 23809, 28420, 28735, 31262, 36124, 40229, 44660, 45155, 47618, 57470, 62524, 63217, 78155, 80458, 90310, 95236, 114940, 119045, 126434, 156310, 160916, 166663, 180620, 201145, 238090, 252868, 261899, 312620, 316085, 333326, 402290, 442519, 476180, 523798, 632170, 666652, 804580, 833315, 885038, 1047596, 1166641, 1264340, 1309495, 1666630, 1770076, 1833293, 2212595, 2333282, 2618990, 3333260, 3666586, 4425190, 4666564, 5237980, 5833205, 7333172, 8850380, 9166465, 11666410, 12833051, 18332930, 23332820, 25666102, 36665860, 51332204, 64165255, 128330510, 256661020]

約数ペア:

[(1, 256661020), (2, 128330510), (4, 64165255), (5, 51332204), (7, 36665860), (10, 25666102), (11, 23332820), (14, 18332930), (20, 12833051), (22, 11666410), (28, 9166465), (29, 8850380), (35, 7333172), (44, 5833205), (49, 5237980), (55, 4666564), (58, 4425190), (70, 3666586), (77, 3333260), (98, 2618990), (110, 2333282), (116, 2212595), (140, 1833293), (145, 1770076), (154, 1666630), (196, 1309495), (203, 1264340), (220, 1166641), (245, 1047596), (290, 885038), (308, 833315), (319, 804580), (385, 666652), (406, 632170), (490, 523798), (539, 476180), (580, 442519), (638, 402290), (770, 333326), (812, 316085), (821, 312620), (980, 261899), (1015, 252868), (1078, 238090), (1276, 201145), (1421, 180620), (1540, 166663), (1595, 160916), (1642, 156310), (2030, 126434), (2156, 119045), (2233, 114940), (2695, 95236), (2842, 90310), (3190, 80458), (3284, 78155), (4060, 63217), (4105, 62524), (4466, 57470), (5390, 47618), (5684, 45155), (5747, 44660), (6380, 40229), (7105, 36124), (8210, 31262), (8932, 28735), (9031, 28420), (10780, 23809), (11165, 22988), (11494, 22330), (14210, 18062), (15631, 16420)]