21384741

素因数分解:

$3^1\times 7^1\times {\mathrm{137}}^1\times {\mathrm{7433}}^1$

素因数の和:7580

約数の個数: 16

約数和(自身を含む): 32828544

約数和(自身を除く): 11443803

約数列:

[1, 3, 7, 21, 137, 411, 959, 2877, 7433, 22299, 52031, 156093, 1018321, 3054963, 7128247, 21384741]

約数ペア:

[(1, 21384741), (3, 7128247), (7, 3054963), (21, 1018321), (137, 156093), (411, 52031), (959, 22299), (2877, 7433)]