19997845

素因数分解:

$5^1\times 7^1\times {\mathrm{743}}^1\times {\mathrm{769}}^1$

素因数の和:1524

約数の個数: 16

約数和(自身を含む): 27498240

約数和(自身を除く): 7500395

約数列:

[1, 5, 7, 35, 743, 769, 3715, 3845, 5201, 5383, 26005, 26915, 571367, 2856835, 3999569, 19997845]

約数ペア:

[(1, 19997845), (5, 3999569), (7, 2856835), (35, 571367), (743, 26915), (769, 26005), (3715, 5383), (3845, 5201)]