12270220

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{8641}}^1$

素因数の和:8721

約数の個数: 24

約数和(自身を含む): 26133408

約数和(自身を除く): 13863188

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 8641, 17282, 34564, 43205, 86410, 172820, 613511, 1227022, 2454044, 3067555, 6135110, 12270220]

約数ペア:

[(1, 12270220), (2, 6135110), (4, 3067555), (5, 2454044), (10, 1227022), (20, 613511), (71, 172820), (142, 86410), (284, 43205), (355, 34564), (710, 17282), (1420, 8641)]