21909915

素因数分解:

$3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{21169}}^1$

素因数の和:21203

約数の個数: 24

約数和(自身を含む): 39630240

約数和(自身を除く): 17720325

約数列:

[1, 3, 5, 9, 15, 23, 45, 69, 115, 207, 345, 1035, 21169, 63507, 105845, 190521, 317535, 486887, 952605, 1460661, 2434435, 4381983, 7303305, 21909915]

約数ペア:

[(1, 21909915), (3, 7303305), (5, 4381983), (9, 2434435), (15, 1460661), (23, 952605), (45, 486887), (69, 317535), (115, 190521), (207, 105845), (345, 63507), (1035, 21169)]