21564221

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{281}}^1\times {\mathrm{577}}^1$

素因数の和:884

約数の個数: 16

約数和(自身を含む): 26079360

約数和(自身を除く): 4515139

約数列:

[1, 7, 19, 133, 281, 577, 1967, 4039, 5339, 10963, 37373, 76741, 162137, 1134959, 3080603, 21564221]

約数ペア:

[(1, 21564221), (7, 3080603), (19, 1134959), (133, 162137), (281, 76741), (577, 37373), (1967, 10963), (4039, 5339)]