21253127

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{101}}^1\times {\mathrm{1307}}^1$

素因数の和:1438

約数の個数: 16

約数和(自身を含む): 25615872

約数和(自身を除く): 4362745

約数列:

[1, 7, 23, 101, 161, 707, 1307, 2323, 9149, 16261, 30061, 132007, 210427, 924049, 3036161, 21253127]

約数ペア:

[(1, 21253127), (7, 3036161), (23, 924049), (101, 210427), (161, 132007), (707, 30061), (1307, 16261), (2323, 9149)]