21258153

素因数分解:

$3^3\times 7^1\times {\mathrm{137}}^1\times {\mathrm{821}}^1$

素因数の和:974

約数の個数: 32

約数和(自身を含む): 36299520

約数和(自身を除く): 15041367

約数列:

[1, 3, 7, 9, 21, 27, 63, 137, 189, 411, 821, 959, 1233, 2463, 2877, 3699, 5747, 7389, 8631, 17241, 22167, 25893, 51723, 112477, 155169, 337431, 787339, 1012293, 2362017, 3036879, 7086051, 21258153]

約数ペア:

[(1, 21258153), (3, 7086051), (7, 3036879), (9, 2362017), (21, 1012293), (27, 787339), (63, 337431), (137, 155169), (189, 112477), (411, 51723), (821, 25893), (959, 22167), (1233, 17241), (2463, 8631), (2877, 7389), (3699, 5747)]