21547981

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{107}}^1\times {\mathrm{2213}}^1$

素因数の和:2340

約数の個数: 16

約数和(自身を含む): 26780544

約数和(自身を除く): 5232563

約数列:

[1, 7, 13, 91, 107, 749, 1391, 2213, 9737, 15491, 28769, 201383, 236791, 1657537, 3078283, 21547981]

約数ペア:

[(1, 21547981), (7, 3078283), (13, 1657537), (91, 236791), (107, 201383), (749, 28769), (1391, 15491), (2213, 9737)]