21493521

素因数分解:

$3^2\times 7^1\times {\mathrm{311}}^1\times {\mathrm{1097}}^1$

素因数の和:1421

約数の個数: 24

約数和(自身を含む): 35627904

約数和(自身を除く): 14134383

約数列:

[1, 3, 7, 9, 21, 63, 311, 933, 1097, 2177, 2799, 3291, 6531, 7679, 9873, 19593, 23037, 69111, 341167, 1023501, 2388169, 3070503, 7164507, 21493521]

約数ペア:

[(1, 21493521), (3, 7164507), (7, 3070503), (9, 2388169), (21, 1023501), (63, 341167), (311, 69111), (933, 23037), (1097, 19593), (2177, 9873), (2799, 7679), (3291, 6531)]