21001585

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{421}}^1\times {\mathrm{907}}^1$

素因数の和:1344

約数の個数: 16

約数和(自身を含む): 27588672

約数和(自身を除く): 6587087

約数列:

[1, 5, 11, 55, 421, 907, 2105, 4535, 4631, 9977, 23155, 49885, 381847, 1909235, 4200317, 21001585]

約数ペア:

[(1, 21001585), (5, 4200317), (11, 1909235), (55, 381847), (421, 49885), (907, 23155), (2105, 9977), (4535, 4631)]