20716515

素因数分解:

$3^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{7547}}^1$

素因数の和:7619

約数の個数: 24

約数和(自身を含む): 36502128

約数和(自身を除く): 15785613

約数列:

[1, 3, 5, 9, 15, 45, 61, 183, 305, 549, 915, 2745, 7547, 22641, 37735, 67923, 113205, 339615, 460367, 1381101, 2301835, 4143303, 6905505, 20716515]

約数ペア:

[(1, 20716515), (3, 6905505), (5, 4143303), (9, 2301835), (15, 1381101), (45, 460367), (61, 339615), (183, 113205), (305, 67923), (549, 37735), (915, 22641), (2745, 7547)]