21268261

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{59}}^1\times {\mathrm{2239}}^1$

素因数の和:2328

約数の個数: 16

約数和(自身を含む): 25804800

約数和(自身を除く): 4536539

約数列:

[1, 7, 23, 59, 161, 413, 1357, 2239, 9499, 15673, 51497, 132101, 360479, 924707, 3038323, 21268261]

約数ペア:

[(1, 21268261), (7, 3038323), (23, 924707), (59, 360479), (161, 132101), (413, 51497), (1357, 15673), (2239, 9499)]