80781640

素因数分解:

$2^3\times 5^1\times {\mathrm{1279}}^1\times {\mathrm{1579}}^1$

素因数の和:2869

約数の個数: 32

約数和(自身を含む): 182016000

約数和(自身を除く): 101234360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1279, 1579, 2558, 3158, 5116, 6316, 6395, 7895, 10232, 12632, 12790, 15790, 25580, 31580, 51160, 63160, 2019541, 4039082, 8078164, 10097705, 16156328, 20195410, 40390820, 80781640]

約数ペア:

[(1, 80781640), (2, 40390820), (4, 20195410), (5, 16156328), (8, 10097705), (10, 8078164), (20, 4039082), (40, 2019541), (1279, 63160), (1579, 51160), (2558, 31580), (3158, 25580), (5116, 15790), (6316, 12790), (6395, 12632), (7895, 10232)]