20665900

素因数分解:

$2^2\times 5^2\times {\mathrm{47}}^1\times {\mathrm{4397}}^1$

素因数の和:4458

約数の個数: 36

約数和(自身を含む): 45809568

約数和(自身を除く): 25143668

約数列:

[1, 2, 4, 5, 10, 20, 25, 47, 50, 94, 100, 188, 235, 470, 940, 1175, 2350, 4397, 4700, 8794, 17588, 21985, 43970, 87940, 109925, 206659, 219850, 413318, 439700, 826636, 1033295, 2066590, 4133180, 5166475, 10332950, 20665900]

約数ペア:

[(1, 20665900), (2, 10332950), (4, 5166475), (5, 4133180), (10, 2066590), (20, 1033295), (25, 826636), (47, 439700), (50, 413318), (94, 219850), (100, 206659), (188, 109925), (235, 87940), (470, 43970), (940, 21985), (1175, 17588), (2350, 8794), (4397, 4700)]