20557305

素因数分解:

$3^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{7489}}^1$

素因数の和:7561

約数の個数: 24

約数和(自身を含む): 36221640

約数和(自身を除く): 15664335

約数列:

[1, 3, 5, 9, 15, 45, 61, 183, 305, 549, 915, 2745, 7489, 22467, 37445, 67401, 112335, 337005, 456829, 1370487, 2284145, 4111461, 6852435, 20557305]

約数ペア:

[(1, 20557305), (3, 6852435), (5, 4111461), (9, 2284145), (15, 1370487), (45, 456829), (61, 337005), (183, 112335), (305, 67401), (549, 37445), (915, 22467), (2745, 7489)]