28142779

素因数分解:

$7^1\times {\mathrm{89}}^1\times {\mathrm{199}}^1\times {\mathrm{227}}^1$

素因数の和:522

約数の個数: 16

約数和(自身を含む): 32832000

約数和(自身を除く): 4689221

約数列:

[1, 7, 89, 199, 227, 623, 1393, 1589, 17711, 20203, 45173, 123977, 141421, 316211, 4020397, 28142779]

約数ペア:

[(1, 28142779), (7, 4020397), (89, 316211), (199, 141421), (227, 123977), (623, 45173), (1393, 20203), (1589, 17711)]