20511118

素因数分解:

$2^1\times {\mathrm{89}}^1\times {\mathrm{139}}^1\times {\mathrm{829}}^1$

素因数の和:1059

約数の個数: 16

約数和(自身を含む): 31374000

約数和(自身を除く): 10862882

約数列:

[1, 2, 89, 139, 178, 278, 829, 1658, 12371, 24742, 73781, 115231, 147562, 230462, 10255559, 20511118]

約数ペア:

[(1, 20511118), (2, 10255559), (89, 230462), (139, 147562), (178, 115231), (278, 73781), (829, 24742), (1658, 12371)]