21890351

素因数分解:

$7^1\times {\mathrm{41}}^1\times {\mathrm{89}}^1\times {\mathrm{857}}^1$

素因数の和:994

約数の個数: 16

約数和(自身を含む): 25945920

約数和(自身を除く): 4055569

約数列:

[1, 7, 41, 89, 287, 623, 857, 3649, 5999, 25543, 35137, 76273, 245959, 533911, 3127193, 21890351]

約数ペア:

[(1, 21890351), (7, 3127193), (41, 533911), (89, 245959), (287, 76273), (623, 35137), (857, 25543), (3649, 5999)]