396560

素因数分解:

$2^4\times 5^1\times {\mathrm{4957}}^1$

素因数の和:4970

約数の個数: 20

約数和(自身を含む): 922188

約数和(自身を除く): 525628

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 4957, 9914, 19828, 24785, 39656, 49570, 79312, 99140, 198280, 396560]

約数ペア:

[(1, 396560), (2, 198280), (4, 99140), (5, 79312), (8, 49570), (10, 39656), (16, 24785), (20, 19828), (40, 9914), (80, 4957)]