408078280

素因数分解:

$2^3\times 5^1\times {\mathrm{10201957}}^1$

素因数の和:10201968

約数の個数: 16

約数和(自身を含む): 918176220

約数和(自身を除く): 510097940

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 10201957, 20403914, 40807828, 51009785, 81615656, 102019570, 204039140, 408078280]

約数ペア:

[(1, 408078280), (2, 204039140), (4, 102019570), (5, 81615656), (8, 51009785), (10, 40807828), (20, 20403914), (40, 10201957)]