21566575

素因数分解:

$5^2\times {\mathrm{29}}^1\times {\mathrm{151}}^1\times {\mathrm{197}}^1$

素因数の和:387

約数の個数: 24

約数和(自身を含む): 27989280

約数和(自身を除く): 6422705

約数列:

[1, 5, 25, 29, 145, 151, 197, 725, 755, 985, 3775, 4379, 4925, 5713, 21895, 28565, 29747, 109475, 142825, 148735, 743675, 862663, 4313315, 21566575]

約数ペア:

[(1, 21566575), (5, 4313315), (25, 862663), (29, 743675), (145, 148735), (151, 142825), (197, 109475), (725, 29747), (755, 28565), (985, 21895), (3775, 5713), (4379, 4925)]