21156527

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{331}}^1\times {\mathrm{397}}^1$

素因数の和:758

約数の個数: 16

約数和(自身を含む): 25370112

約数和(自身を除く): 4213585

約数列:

[1, 7, 23, 161, 331, 397, 2317, 2779, 7613, 9131, 53291, 63917, 131407, 919849, 3022361, 21156527]

約数ペア:

[(1, 21156527), (7, 3022361), (23, 919849), (161, 131407), (331, 63917), (397, 53291), (2317, 9131), (2779, 7613)]