21170821

素因数分解:

$7^1\times {\mathrm{47}}^1\times {\mathrm{229}}^1\times {\mathrm{281}}^1$

素因数の和:564

約数の個数: 16

約数和(自身を含む): 24906240

約数和(自身を除く): 3735419

約数列:

[1, 7, 47, 229, 281, 329, 1603, 1967, 10763, 13207, 64349, 75341, 92449, 450443, 3024403, 21170821]

約数ペア:

[(1, 21170821), (7, 3024403), (47, 450443), (229, 92449), (281, 75341), (329, 64349), (1603, 13207), (1967, 10763)]