21172255

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{307}}^1\times {\mathrm{1061}}^1$

素因数の和:1386

約数の個数: 16

約数和(自身を含む): 27476064

約数和(自身を除く): 6303809

約数列:

[1, 5, 13, 65, 307, 1061, 1535, 3991, 5305, 13793, 19955, 68965, 325727, 1628635, 4234451, 21172255]

約数ペア:

[(1, 21172255), (5, 4234451), (13, 1628635), (65, 325727), (307, 68965), (1061, 19955), (1535, 13793), (3991, 5305)]