12889640

素因数分解:

$2^3\times 5^1\times {\mathrm{79}}^1\times {\mathrm{4079}}^1$

素因数の和:4169

約数の個数: 32

約数和(自身を含む): 29376000

約数和(自身を除く): 16486360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 79, 158, 316, 395, 632, 790, 1580, 3160, 4079, 8158, 16316, 20395, 32632, 40790, 81580, 163160, 322241, 644482, 1288964, 1611205, 2577928, 3222410, 6444820, 12889640]

約数ペア:

[(1, 12889640), (2, 6444820), (4, 3222410), (5, 2577928), (8, 1611205), (10, 1288964), (20, 644482), (40, 322241), (79, 163160), (158, 81580), (316, 40790), (395, 32632), (632, 20395), (790, 16316), (1580, 8158), (3160, 4079)]