21188805

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{281}}^1\times {\mathrm{457}}^1$

素因数の和:757

約数の個数: 32

約数和(自身を含む): 37196928

約数和(自身を除く): 16008123

約数列:

[1, 3, 5, 11, 15, 33, 55, 165, 281, 457, 843, 1371, 1405, 2285, 3091, 4215, 5027, 6855, 9273, 15081, 15455, 25135, 46365, 75405, 128417, 385251, 642085, 1412587, 1926255, 4237761, 7062935, 21188805]

約数ペア:

[(1, 21188805), (3, 7062935), (5, 4237761), (11, 1926255), (15, 1412587), (33, 642085), (55, 385251), (165, 128417), (281, 75405), (457, 46365), (843, 25135), (1371, 15455), (1405, 15081), (2285, 9273), (3091, 6855), (4215, 5027)]