21307449

素因数分解:

$3^1\times {\mathrm{37}}^1\times {\mathrm{139}}^1\times {\mathrm{1381}}^1$

素因数の和:1560

約数の個数: 16

約数和(自身を含む): 29408960

約数和(自身を除く): 8101511

約数列:

[1, 3, 37, 111, 139, 417, 1381, 4143, 5143, 15429, 51097, 153291, 191959, 575877, 7102483, 21307449]

約数ペア:

[(1, 21307449), (3, 7102483), (37, 575877), (111, 191959), (139, 153291), (417, 51097), (1381, 15429), (4143, 5143)]