81771320

素因数分解:

$2^3\times 5^1\times {\mathrm{79}}^1\times {\mathrm{113}}^1\times {\mathrm{229}}^1$

素因数の和:432

約数の個数: 64

約数和(自身を含む): 188784000

約数和(自身を除く): 107012680

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 79, 113, 158, 226, 229, 316, 395, 452, 458, 565, 632, 790, 904, 916, 1130, 1145, 1580, 1832, 2260, 2290, 3160, 4520, 4580, 8927, 9160, 17854, 18091, 25877, 35708, 36182, 44635, 51754, 71416, 72364, 89270, 90455, 103508, 129385, 144728, 178540, 180910, 207016, 258770, 357080, 361820, 517540, 723640, 1035080, 2044283, 4088566, 8177132, 10221415, 16354264, 20442830, 40885660, 81771320]

約数ペア:

[(1, 81771320), (2, 40885660), (4, 20442830), (5, 16354264), (8, 10221415), (10, 8177132), (20, 4088566), (40, 2044283), (79, 1035080), (113, 723640), (158, 517540), (226, 361820), (229, 357080), (316, 258770), (395, 207016), (452, 180910), (458, 178540), (565, 144728), (632, 129385), (790, 103508), (904, 90455), (916, 89270), (1130, 72364), (1145, 71416), (1580, 51754), (1832, 44635), (2260, 36182), (2290, 35708), (3160, 25877), (4520, 18091), (4580, 17854), (8927, 9160)]