21897155

素因数分解:

$5^1\times 7^1\times {\mathrm{37}}^2\times {\mathrm{457}}^1$

素因数の和:543

約数の個数: 24

約数和(自身を含む): 30931488

約数和(自身を除く): 9034333

約数列:

[1, 5, 7, 35, 37, 185, 259, 457, 1295, 1369, 2285, 3199, 6845, 9583, 15995, 16909, 47915, 84545, 118363, 591815, 625633, 3128165, 4379431, 21897155]

約数ペア:

[(1, 21897155), (5, 4379431), (7, 3128165), (35, 625633), (37, 591815), (185, 118363), (259, 84545), (457, 47915), (1295, 16909), (1369, 15995), (2285, 9583), (3199, 6845)]