20553795

素因数分解:

$3^2\times 5^1\times {\mathrm{661}}^1\times {\mathrm{691}}^1$

素因数の和:1363

約数の個数: 24

約数和(自身を含む): 35732112

約数和(自身を除く): 15178317

約数列:

[1, 3, 5, 9, 15, 45, 661, 691, 1983, 2073, 3305, 3455, 5949, 6219, 9915, 10365, 29745, 31095, 456751, 1370253, 2283755, 4110759, 6851265, 20553795]

約数ペア:

[(1, 20553795), (3, 6851265), (5, 4110759), (9, 2283755), (15, 1370253), (45, 456751), (661, 31095), (691, 29745), (1983, 10365), (2073, 9915), (3305, 6219), (3455, 5949)]