21652640

素因数分解:

$2^5\times 5^1\times {\mathrm{135329}}^1$

素因数の和:135344

約数の個数: 24

約数和(自身を含む): 51154740

約数和(自身を除く): 29502100

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 135329, 270658, 541316, 676645, 1082632, 1353290, 2165264, 2706580, 4330528, 5413160, 10826320, 21652640]

約数ペア:

[(1, 21652640), (2, 10826320), (4, 5413160), (5, 4330528), (8, 2706580), (10, 2165264), (16, 1353290), (20, 1082632), (32, 676645), (40, 541316), (80, 270658), (160, 135329)]