643346920

素因数分解:

$2^3\times 5^1\times {\mathrm{1223}}^1\times {\mathrm{13151}}^1$

素因数の和:14385

約数の個数: 32

約数和(自身を含む): 1448824320

約数和(自身を除く): 805477400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1223, 2446, 4892, 6115, 9784, 12230, 13151, 24460, 26302, 48920, 52604, 65755, 105208, 131510, 263020, 526040, 16083673, 32167346, 64334692, 80418365, 128669384, 160836730, 321673460, 643346920]

約数ペア:

[(1, 643346920), (2, 321673460), (4, 160836730), (5, 128669384), (8, 80418365), (10, 64334692), (20, 32167346), (40, 16083673), (1223, 526040), (2446, 263020), (4892, 131510), (6115, 105208), (9784, 65755), (12230, 52604), (13151, 48920), (24460, 26302)]