20491665

素因数分解:

$3^1\times 5^1\times {\mathrm{71}}^2\times {\mathrm{271}}^1$

素因数の和:421

約数の個数: 24

約数和(自身を含む): 33377664

約数和(自身を除く): 12885999

約数列:

[1, 3, 5, 15, 71, 213, 271, 355, 813, 1065, 1355, 4065, 5041, 15123, 19241, 25205, 57723, 75615, 96205, 288615, 1366111, 4098333, 6830555, 20491665]

約数ペア:

[(1, 20491665), (3, 6830555), (5, 4098333), (15, 1366111), (71, 288615), (213, 96205), (271, 75615), (355, 57723), (813, 25205), (1065, 19241), (1355, 15123), (4065, 5041)]