129128920

素因数分解:

$2^3\times 5^1\times {\mathrm{3228223}}^1$

素因数の和:3228234

約数の個数: 16

約数和(自身を含む): 290540160

約数和(自身を除く): 161411240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 3228223, 6456446, 12912892, 16141115, 25825784, 32282230, 64564460, 129128920]

約数ペア:

[(1, 129128920), (2, 64564460), (4, 32282230), (5, 25825784), (8, 16141115), (10, 12912892), (20, 6456446), (40, 3228223)]