81171280

素因数分解:

$2^4\times 5^1\times {\mathrm{1014641}}^1$

素因数の和:1014654

約数の個数: 20

約数和(自身を含む): 188723412

約数和(自身を除く): 107552132

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1014641, 2029282, 4058564, 5073205, 8117128, 10146410, 16234256, 20292820, 40585640, 81171280]

約数ペア:

[(1, 81171280), (2, 40585640), (4, 20292820), (5, 16234256), (8, 10146410), (10, 8117128), (16, 5073205), (20, 4058564), (40, 2029282), (80, 1014641)]