21275989

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{103}}^1\times {\mathrm{1283}}^1$

素因数の和:1416

約数の個数: 16

約数和(自身を含む): 25638912

約数和(自身を除く): 4362923

約数列:

[1, 7, 23, 103, 161, 721, 1283, 2369, 8981, 16583, 29509, 132149, 206563, 925043, 3039427, 21275989]

約数ペア:

[(1, 21275989), (7, 3039427), (23, 925043), (103, 206563), (161, 132149), (721, 29509), (1283, 16583), (2369, 8981)]