65621680

素因数分解:

$2^4\times 5^1\times {\mathrm{820271}}^1$

素因数の和:820284

約数の個数: 20

約数和(自身を含む): 152570592

約数和(自身を除く): 86948912

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 820271, 1640542, 3281084, 4101355, 6562168, 8202710, 13124336, 16405420, 32810840, 65621680]

約数ペア:

[(1, 65621680), (2, 32810840), (4, 16405420), (5, 13124336), (8, 8202710), (10, 6562168), (16, 4101355), (20, 3281084), (40, 1640542), (80, 820271)]