20902750

素因数分解:

$2^1\times 5^3\times {\mathrm{11}}^2\times {\mathrm{691}}^1$

素因数の和:730

約数の個数: 48

約数和(自身を含む): 43072848

約数和(自身を除く): 22170098

約数列:

[1, 2, 5, 10, 11, 22, 25, 50, 55, 110, 121, 125, 242, 250, 275, 550, 605, 691, 1210, 1375, 1382, 2750, 3025, 3455, 6050, 6910, 7601, 15125, 15202, 17275, 30250, 34550, 38005, 76010, 83611, 86375, 167222, 172750, 190025, 380050, 418055, 836110, 950125, 1900250, 2090275, 4180550, 10451375, 20902750]

約数ペア:

[(1, 20902750), (2, 10451375), (5, 4180550), (10, 2090275), (11, 1900250), (22, 950125), (25, 836110), (50, 418055), (55, 380050), (110, 190025), (121, 172750), (125, 167222), (242, 86375), (250, 83611), (275, 76010), (550, 38005), (605, 34550), (691, 30250), (1210, 17275), (1375, 15202), (1382, 15125), (2750, 7601), (3025, 6910), (3455, 6050)]