21176905

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{107}}^1\times {\mathrm{1721}}^1$

素因数の和:1856

約数の個数: 16

約数和(自身を含む): 26780544

約数和(自身を除く): 5603639

約数列:

[1, 5, 23, 107, 115, 535, 1721, 2461, 8605, 12305, 39583, 184147, 197915, 920735, 4235381, 21176905]

約数ペア:

[(1, 21176905), (5, 4235381), (23, 920735), (107, 197915), (115, 184147), (535, 39583), (1721, 12305), (2461, 8605)]