128878280

素因数分解:

$2^3\times 5^1\times {\mathrm{3221957}}^1$

素因数の和:3221968

約数の個数: 16

約数和(自身を含む): 289976220

約数和(自身を除く): 161097940

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 3221957, 6443914, 12887828, 16109785, 25775656, 32219570, 64439140, 128878280]

約数ペア:

[(1, 128878280), (2, 64439140), (4, 32219570), (5, 25775656), (8, 16109785), (10, 12887828), (20, 6443914), (40, 3221957)]