21820005

素因数分解:

$3^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{7949}}^1$

素因数の和:8021

約数の個数: 24

約数和(自身を含む): 38446200

約数和(自身を除く): 16626195

約数列:

[1, 3, 5, 9, 15, 45, 61, 183, 305, 549, 915, 2745, 7949, 23847, 39745, 71541, 119235, 357705, 484889, 1454667, 2424445, 4364001, 7273335, 21820005]

約数ペア:

[(1, 21820005), (3, 7273335), (5, 4364001), (9, 2424445), (15, 1454667), (45, 484889), (61, 357705), (183, 119235), (305, 71541), (549, 39745), (915, 23847), (2745, 7949)]