21212247

素因数分解:

$3^1\times 7^2\times {\mathrm{113}}^1\times {\mathrm{1277}}^1$

素因数の和:1407

約数の個数: 24

約数和(自身を含む): 33217776

約数和(自身を除く): 12005529

約数列:

[1, 3, 7, 21, 49, 113, 147, 339, 791, 1277, 2373, 3831, 5537, 8939, 16611, 26817, 62573, 144301, 187719, 432903, 1010107, 3030321, 7070749, 21212247]

約数ペア:

[(1, 21212247), (3, 7070749), (7, 3030321), (21, 1010107), (49, 432903), (113, 187719), (147, 144301), (339, 62573), (791, 26817), (1277, 16611), (2373, 8939), (3831, 5537)]