20445500

素因数分解:

$2^2\times 5^3\times {\mathrm{103}}^1\times {\mathrm{397}}^1$

素因数の和:519

約数の個数: 48

約数和(自身を含む): 45200064

約数和(自身を除く): 24754564

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 103, 125, 206, 250, 397, 412, 500, 515, 794, 1030, 1588, 1985, 2060, 2575, 3970, 5150, 7940, 9925, 10300, 12875, 19850, 25750, 39700, 40891, 49625, 51500, 81782, 99250, 163564, 198500, 204455, 408910, 817820, 1022275, 2044550, 4089100, 5111375, 10222750, 20445500]

約数ペア:

[(1, 20445500), (2, 10222750), (4, 5111375), (5, 4089100), (10, 2044550), (20, 1022275), (25, 817820), (50, 408910), (100, 204455), (103, 198500), (125, 163564), (206, 99250), (250, 81782), (397, 51500), (412, 49625), (500, 40891), (515, 39700), (794, 25750), (1030, 19850), (1588, 12875), (1985, 10300), (2060, 9925), (2575, 7940), (3970, 5150)]