21299929

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{2521}}^1$

素因数の和:2616

約数の個数: 16

約数和(自身を含む): 26148096

約数和(自身を除く): 4848167

約数列:

[1, 7, 17, 71, 119, 497, 1207, 2521, 8449, 17647, 42857, 178991, 299999, 1252937, 3042847, 21299929]

約数ペア:

[(1, 21299929), (7, 3042847), (17, 1252937), (71, 299999), (119, 178991), (497, 42857), (1207, 17647), (2521, 8449)]