819020

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{1321}}^1$

素因数の和:1361

約数の個数: 24

約数和(自身を含む): 1776768

約数和(自身を除く): 957748

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 1321, 2642, 5284, 6605, 13210, 26420, 40951, 81902, 163804, 204755, 409510, 819020]

約数ペア:

[(1, 819020), (2, 409510), (4, 204755), (5, 163804), (10, 81902), (20, 40951), (31, 26420), (62, 13210), (124, 6605), (155, 5284), (310, 2642), (620, 1321)]