128625040

素因数分解:

$2^4\times 5^1\times {\mathrm{43}}^1\times {\mathrm{139}}^1\times {\mathrm{269}}^1$

素因数の和:464

約数の個数: 80

約数和(自身を含む): 309355200

約数和(自身を除く): 180730160

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 43, 80, 86, 139, 172, 215, 269, 278, 344, 430, 538, 556, 688, 695, 860, 1076, 1112, 1345, 1390, 1720, 2152, 2224, 2690, 2780, 3440, 4304, 5380, 5560, 5977, 10760, 11120, 11567, 11954, 21520, 23134, 23908, 29885, 37391, 46268, 47816, 57835, 59770, 74782, 92536, 95632, 115670, 119540, 149564, 185072, 186955, 231340, 239080, 299128, 373910, 462680, 478160, 598256, 747820, 925360, 1495640, 1607813, 2991280, 3215626, 6431252, 8039065, 12862504, 16078130, 25725008, 32156260, 64312520, 128625040]

約数ペア:

[(1, 128625040), (2, 64312520), (4, 32156260), (5, 25725008), (8, 16078130), (10, 12862504), (16, 8039065), (20, 6431252), (40, 3215626), (43, 2991280), (80, 1607813), (86, 1495640), (139, 925360), (172, 747820), (215, 598256), (269, 478160), (278, 462680), (344, 373910), (430, 299128), (538, 239080), (556, 231340), (688, 186955), (695, 185072), (860, 149564), (1076, 119540), (1112, 115670), (1345, 95632), (1390, 92536), (1720, 74782), (2152, 59770), (2224, 57835), (2690, 47816), (2780, 46268), (3440, 37391), (4304, 29885), (5380, 23908), (5560, 23134), (5977, 21520), (10760, 11954), (11120, 11567)]