820172020

素因数分解:

$2^2\times 5^1\times {\mathrm{7621}}^1\times {\mathrm{5381}}^1$

素因数の和:13011

約数の個数: 24

約数和(自身を含む): 1722907368

約数和(自身を除く): 902735348

約数列:

[1, 2, 4, 5, 10, 20, 5381, 7621, 10762, 15242, 21524, 26905, 30484, 38105, 53810, 76210, 107620, 152420, 41008601, 82017202, 164034404, 205043005, 410086010, 820172020]

約数ペア:

[(1, 820172020), (2, 410086010), (4, 205043005), (5, 164034404), (10, 82017202), (20, 41008601), (5381, 152420), (7621, 107620), (10762, 76210), (15242, 53810), (21524, 38105), (26905, 30484)]