253681640

素因数分解:

$2^3\times 5^1\times {\mathrm{79}}^1\times {\mathrm{80279}}^1$

素因数の和:80369

約数の個数: 32

約数和(自身を含む): 578016000

約数和(自身を除く): 324334360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 79, 158, 316, 395, 632, 790, 1580, 3160, 80279, 160558, 321116, 401395, 642232, 802790, 1605580, 3211160, 6342041, 12684082, 25368164, 31710205, 50736328, 63420410, 126840820, 253681640]

約数ペア:

[(1, 253681640), (2, 126840820), (4, 63420410), (5, 50736328), (8, 31710205), (10, 25368164), (20, 12684082), (40, 6342041), (79, 3211160), (158, 1605580), (316, 802790), (395, 642232), (632, 401395), (790, 321116), (1580, 160558), (3160, 80279)]