28198765

素因数分解:

$5^1\times 7^2\times {\mathrm{179}}^1\times {\mathrm{643}}^1$

素因数の和:841

約数の個数: 24

約数和(自身を含む): 39644640

約数和(自身を除く): 11445875

約数列:

[1, 5, 7, 35, 49, 179, 245, 643, 895, 1253, 3215, 4501, 6265, 8771, 22505, 31507, 43855, 115097, 157535, 575485, 805679, 4028395, 5639753, 28198765]

約数ペア:

[(1, 28198765), (5, 5639753), (7, 4028395), (35, 805679), (49, 575485), (179, 157535), (245, 115097), (643, 43855), (895, 31507), (1253, 22505), (3215, 8771), (4501, 6265)]