21987850

素因数分解:

$2^1\times 5^2\times {\mathrm{157}}^1\times {\mathrm{2801}}^1$

素因数の和:2970

約数の個数: 24

約数和(自身を含む): 41172588

約数和(自身を除く): 19184738

約数列:

[1, 2, 5, 10, 25, 50, 157, 314, 785, 1570, 2801, 3925, 5602, 7850, 14005, 28010, 70025, 140050, 439757, 879514, 2198785, 4397570, 10993925, 21987850]

約数ペア:

[(1, 21987850), (2, 10993925), (5, 4397570), (10, 2198785), (25, 879514), (50, 439757), (157, 140050), (314, 70025), (785, 28010), (1570, 14005), (2801, 7850), (3925, 5602)]