21221249

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{89}}^1\times {\mathrm{1481}}^1$

素因数の和:1600

約数の個数: 16

約数和(自身を含む): 25608960

約数和(自身を除く): 4387711

約数列:

[1, 7, 23, 89, 161, 623, 1481, 2047, 10367, 14329, 34063, 131809, 238441, 922663, 3031607, 21221249]

約数ペア:

[(1, 21221249), (7, 3031607), (23, 922663), (89, 238441), (161, 131809), (623, 34063), (1481, 14329), (2047, 10367)]