21897127

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{277}}^1\times {\mathrm{491}}^1$

素因数の和:798

約数の個数: 16

約数和(自身を含む): 26260992

約数和(自身を除く): 4363865

約数列:

[1, 7, 23, 161, 277, 491, 1939, 3437, 6371, 11293, 44597, 79051, 136007, 952049, 3128161, 21897127]

約数ペア:

[(1, 21897127), (7, 3128161), (23, 952049), (161, 136007), (277, 79051), (491, 44597), (1939, 11293), (3437, 6371)]