20900205

素因数分解:

$3^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{4261}}^1$

素因数の和:4381

約数の個数: 24

約数和(自身を含む): 36567960

約数和(自身を除く): 15667755

約数列:

[1, 3, 5, 9, 15, 45, 109, 327, 545, 981, 1635, 4261, 4905, 12783, 21305, 38349, 63915, 191745, 464449, 1393347, 2322245, 4180041, 6966735, 20900205]

約数ペア:

[(1, 20900205), (3, 6966735), (5, 4180041), (9, 2322245), (15, 1393347), (45, 464449), (109, 191745), (327, 63915), (545, 38349), (981, 21305), (1635, 12783), (4261, 4905)]