21230721

素因数分解:

$3^3\times {\mathrm{139}}^1\times {\mathrm{5657}}^1$

素因数の和:5805

約数の個数: 16

約数和(自身を含む): 31684800

約数和(自身を除く): 10454079

約数列:

[1, 3, 9, 27, 139, 417, 1251, 3753, 5657, 16971, 50913, 152739, 786323, 2358969, 7076907, 21230721]

約数ペア:

[(1, 21230721), (3, 7076907), (9, 2358969), (27, 786323), (139, 152739), (417, 50913), (1251, 16971), (3753, 5657)]