19997635

素因数分解:

$5^1\times 7^2\times {\mathrm{31}}^1\times {\mathrm{2633}}^1$

素因数の和:2683

約数の個数: 24

約数和(自身を含む): 28826496

約数和(自身を除く): 8828861

約数列:

[1, 5, 7, 31, 35, 49, 155, 217, 245, 1085, 1519, 2633, 7595, 13165, 18431, 81623, 92155, 129017, 408115, 571361, 645085, 2856805, 3999527, 19997635]

約数ペア:

[(1, 19997635), (5, 3999527), (7, 2856805), (31, 645085), (35, 571361), (49, 408115), (155, 129017), (217, 92155), (245, 81623), (1085, 18431), (1519, 13165), (2633, 7595)]