21428876

素因数分解:

$2^2\times 7^2\times {\mathrm{109331}}^1$

素因数の和:109349

約数の個数: 18

約数和(自身を含む): 43623468

約数和(自身を除く): 22194592

約数列:

[1, 2, 4, 7, 14, 28, 49, 98, 196, 109331, 218662, 437324, 765317, 1530634, 3061268, 5357219, 10714438, 21428876]

約数ペア:

[(1, 21428876), (2, 10714438), (4, 5357219), (7, 3061268), (14, 1530634), (28, 765317), (49, 437324), (98, 218662), (196, 109331)]