21987357

素因数分解:

$3^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{25537}}^1$

素因数の和:25588

約数の個数: 16

約数和(自身を含む): 34323072

約数和(自身を除く): 12335715

約数列:

[1, 3, 7, 21, 41, 123, 287, 861, 25537, 76611, 178759, 536277, 1047017, 3141051, 7329119, 21987357]

約数ペア:

[(1, 21987357), (3, 7329119), (7, 3141051), (21, 1047017), (41, 536277), (123, 178759), (287, 76611), (861, 25537)]