21192717

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{149}}^1\times {\mathrm{521}}^1$

素因数の和:693

約数の個数: 32

約数和(自身を含む): 35078400

約数和(自身を除く): 13885683

約数列:

[1, 3, 7, 13, 21, 39, 91, 149, 273, 447, 521, 1043, 1563, 1937, 3129, 3647, 5811, 6773, 10941, 13559, 20319, 40677, 47411, 77629, 142233, 232887, 543403, 1009177, 1630209, 3027531, 7064239, 21192717]

約数ペア:

[(1, 21192717), (3, 7064239), (7, 3027531), (13, 1630209), (21, 1009177), (39, 543403), (91, 232887), (149, 142233), (273, 77629), (447, 47411), (521, 40677), (1043, 20319), (1563, 13559), (1937, 10941), (3129, 6773), (3647, 5811)]