66921640

素因数分解:

$2^3\times 5^1\times {\mathrm{109}}^1\times {\mathrm{15349}}^1$

素因数の和:15469

約数の個数: 32

約数和(自身を含む): 151965000

約数和(自身を除く): 85043360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 109, 218, 436, 545, 872, 1090, 2180, 4360, 15349, 30698, 61396, 76745, 122792, 153490, 306980, 613960, 1673041, 3346082, 6692164, 8365205, 13384328, 16730410, 33460820, 66921640]

約数ペア:

[(1, 66921640), (2, 33460820), (4, 16730410), (5, 13384328), (8, 8365205), (10, 6692164), (20, 3346082), (40, 1673041), (109, 613960), (218, 306980), (436, 153490), (545, 122792), (872, 76745), (1090, 61396), (2180, 30698), (4360, 15349)]