21378637

素因数分解:

$7^1\times {\mathrm{37}}^1\times {\mathrm{197}}^1\times {\mathrm{419}}^1$

素因数の和:660

約数の個数: 16

約数和(自身を含む): 25280640

約数和(自身を除く): 3902003

約数列:

[1, 7, 37, 197, 259, 419, 1379, 2933, 7289, 15503, 51023, 82543, 108521, 577801, 3054091, 21378637]

約数ペア:

[(1, 21378637), (7, 3054091), (37, 577801), (197, 108521), (259, 82543), (419, 51023), (1379, 15503), (2933, 7289)]