21201935

素因数分解:

$5^1\times {\mathrm{47}}^1\times {\mathrm{83}}^1\times {\mathrm{1087}}^1$

素因数の和:1222

約数の個数: 16

約数和(自身を含む): 26320896

約数和(自身を除く): 5118961

約数列:

[1, 5, 47, 83, 235, 415, 1087, 3901, 5435, 19505, 51089, 90221, 255445, 451105, 4240387, 21201935]

約数ペア:

[(1, 21201935), (5, 4240387), (47, 451105), (83, 255445), (235, 90221), (415, 51089), (1087, 19505), (3901, 5435)]