21205247

素因数分解:

$7^1\times {\mathrm{53}}^1\times {\mathrm{61}}^1\times {\mathrm{937}}^1$

素因数の和:1058

約数の個数: 16

約数和(自身を含む): 25123392

約数和(自身を除く): 3918145

約数列:

[1, 7, 53, 61, 371, 427, 937, 3233, 6559, 22631, 49661, 57157, 347627, 400099, 3029321, 21205247]

約数ペア:

[(1, 21205247), (7, 3029321), (53, 400099), (61, 347627), (371, 57157), (427, 49661), (937, 22631), (3233, 6559)]