21500731

素因数分解:

$7^1\times {\mathrm{43}}^1\times {\mathrm{61}}^1\times {\mathrm{1171}}^1$

素因数の和:1282

約数の個数: 16

約数和(自身を含む): 25577728

約数和(自身を除く): 4076997

約数列:

[1, 7, 43, 61, 301, 427, 1171, 2623, 8197, 18361, 50353, 71431, 352471, 500017, 3071533, 21500731]

約数ペア:

[(1, 21500731), (7, 3071533), (43, 500017), (61, 352471), (301, 71431), (427, 50353), (1171, 18361), (2623, 8197)]