20851245

素因数分解:

$3^2\times 5^1\times {\mathrm{661}}^1\times {\mathrm{701}}^1$

素因数の和:1373

約数の個数: 24

約数和(自身を含む): 36248472

約数和(自身を除く): 15397227

約数列:

[1, 3, 5, 9, 15, 45, 661, 701, 1983, 2103, 3305, 3505, 5949, 6309, 9915, 10515, 29745, 31545, 463361, 1390083, 2316805, 4170249, 6950415, 20851245]

約数ペア:

[(1, 20851245), (3, 6950415), (5, 4170249), (9, 2316805), (15, 1390083), (45, 463361), (661, 31545), (701, 29745), (1983, 10515), (2103, 9915), (3305, 6309), (3505, 5949)]