20684385

素因数分解:

$3^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{4217}}^1$

素因数の和:4337

約数の個数: 24

約数和(自身を含む): 36190440

約数和(自身を除く): 15506055

約数列:

[1, 3, 5, 9, 15, 45, 109, 327, 545, 981, 1635, 4217, 4905, 12651, 21085, 37953, 63255, 189765, 459653, 1378959, 2298265, 4136877, 6894795, 20684385]

約数ペア:

[(1, 20684385), (3, 6894795), (5, 4136877), (9, 2298265), (15, 1378959), (45, 459653), (109, 189765), (327, 63255), (545, 37953), (981, 21085), (1635, 12651), (4217, 4905)]