20215815

素因数分解:

$3^1\times 5^1\times {\mathrm{239}}^1\times {\mathrm{5639}}^1$

素因数の和:5886

約数の個数: 16

約数和(自身を含む): 32486400

約数和(自身を除く): 12270585

約数列:

[1, 3, 5, 15, 239, 717, 1195, 3585, 5639, 16917, 28195, 84585, 1347721, 4043163, 6738605, 20215815]

約数ペア:

[(1, 20215815), (3, 6738605), (5, 4043163), (15, 1347721), (239, 84585), (717, 28195), (1195, 16917), (3585, 5639)]