21413511

素因数分解:

$3^3\times 7^1\times {\mathrm{137}}^1\times {\mathrm{827}}^1$

素因数の和:980

約数の個数: 32

約数和(自身を含む): 36564480

約数和(自身を除く): 15150969

約数列:

[1, 3, 7, 9, 21, 27, 63, 137, 189, 411, 827, 959, 1233, 2481, 2877, 3699, 5789, 7443, 8631, 17367, 22329, 25893, 52101, 113299, 156303, 339897, 793093, 1019691, 2379279, 3059073, 7137837, 21413511]

約数ペア:

[(1, 21413511), (3, 7137837), (7, 3059073), (9, 2379279), (21, 1019691), (27, 793093), (63, 339897), (137, 156303), (189, 113299), (411, 52101), (827, 25893), (959, 22329), (1233, 17367), (2481, 8631), (2877, 7443), (3699, 5789)]