64398520

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{37441}}^1$

素因数の和:37495

約数の個数: 32

約数和(自身を含む): 148270320

約数和(自身を除く): 83871800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 37441, 74882, 149764, 187205, 299528, 374410, 748820, 1497640, 1609963, 3219926, 6439852, 8049815, 12879704, 16099630, 32199260, 64398520]

約数ペア:

[(1, 64398520), (2, 32199260), (4, 16099630), (5, 12879704), (8, 8049815), (10, 6439852), (20, 3219926), (40, 1609963), (43, 1497640), (86, 748820), (172, 374410), (215, 299528), (344, 187205), (430, 149764), (860, 74882), (1720, 37441)]