64421360

素因数分解:

$2^4\times 5^1\times {\mathrm{805267}}^1$

素因数の和:805280

約数の個数: 20

約数和(自身を含む): 149779848

約数和(自身を除く): 85358488

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 805267, 1610534, 3221068, 4026335, 6442136, 8052670, 12884272, 16105340, 32210680, 64421360]

約数ペア:

[(1, 64421360), (2, 32210680), (4, 16105340), (5, 12884272), (8, 8052670), (10, 6442136), (16, 4026335), (20, 3221068), (40, 1610534), (80, 805267)]