221311221

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{223}}^1\times {\mathrm{757}}^1$

素因数の和:1025

約数の個数: 32

約数和(自身を含む): 326000640

約数和(自身を除く): 104689419

約数列:

[1, 3, 19, 23, 57, 69, 223, 437, 669, 757, 1311, 2271, 4237, 5129, 12711, 14383, 15387, 17411, 43149, 52233, 97451, 168811, 292353, 330809, 506433, 992427, 3207409, 3882653, 9622227, 11647959, 73770407, 221311221]

約数ペア:

[(1, 221311221), (3, 73770407), (19, 11647959), (23, 9622227), (57, 3882653), (69, 3207409), (223, 992427), (437, 506433), (669, 330809), (757, 292353), (1311, 168811), (2271, 97451), (4237, 52233), (5129, 43149), (12711, 17411), (14383, 15387)]