21218628

素因数分解:

$2^2\times 3^1\times {\mathrm{139}}^1\times {\mathrm{12721}}^1$

素因数の和:12867

約数の個数: 24

約数和(自身を含む): 49870240

約数和(自身を除く): 28651612

約数列:

[1, 2, 3, 4, 6, 12, 139, 278, 417, 556, 834, 1668, 12721, 25442, 38163, 50884, 76326, 152652, 1768219, 3536438, 5304657, 7072876, 10609314, 21218628]

約数ペア:

[(1, 21218628), (2, 10609314), (3, 7072876), (4, 5304657), (6, 3536438), (12, 1768219), (139, 152652), (278, 76326), (417, 50884), (556, 38163), (834, 25442), (1668, 12721)]