64391620

素因数分解:

$2^2\times 5^1\times {\mathrm{1579}}^1\times {\mathrm{2039}}^1$

素因数の和:3627

約数の個数: 24

約数和(自身を含む): 135374400

約数和(自身を除く): 70982780

約数列:

[1, 2, 4, 5, 10, 20, 1579, 2039, 3158, 4078, 6316, 7895, 8156, 10195, 15790, 20390, 31580, 40780, 3219581, 6439162, 12878324, 16097905, 32195810, 64391620]

約数ペア:

[(1, 64391620), (2, 32195810), (4, 16097905), (5, 12878324), (10, 6439162), (20, 3219581), (1579, 40780), (2039, 31580), (3158, 20390), (4078, 15790), (6316, 10195), (7895, 8156)]