20996505

素因数分解:

$3^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{7649}}^1$

素因数の和:7721

約数の個数: 24

約数和(自身を含む): 36995400

約数和(自身を除く): 15998895

約数列:

[1, 3, 5, 9, 15, 45, 61, 183, 305, 549, 915, 2745, 7649, 22947, 38245, 68841, 114735, 344205, 466589, 1399767, 2332945, 4199301, 6998835, 20996505]

約数ペア:

[(1, 20996505), (3, 6998835), (5, 4199301), (9, 2332945), (15, 1399767), (45, 466589), (61, 344205), (183, 114735), (305, 68841), (549, 38245), (915, 22947), (2745, 7649)]