21404875

素因数分解:

$5^3\times {\mathrm{109}}^1\times {\mathrm{1571}}^1$

素因数の和:1695

約数の個数: 16

約数和(自身を含む): 26975520

約数和(自身を除く): 5570645

約数列:

[1, 5, 25, 109, 125, 545, 1571, 2725, 7855, 13625, 39275, 171239, 196375, 856195, 4280975, 21404875]

約数ペア:

[(1, 21404875), (5, 4280975), (25, 856195), (109, 196375), (125, 171239), (545, 39275), (1571, 13625), (2725, 7855)]