81446780

素因数分解:

$2^2\times 5^1\times {\mathrm{499}}^1\times {\mathrm{8161}}^1$

素因数の和:8669

約数の個数: 24

約数和(自身を含む): 171402000

約数和(自身を除く): 89955220

約数列:

[1, 2, 4, 5, 10, 20, 499, 998, 1996, 2495, 4990, 8161, 9980, 16322, 32644, 40805, 81610, 163220, 4072339, 8144678, 16289356, 20361695, 40723390, 81446780]

約数ペア:

[(1, 81446780), (2, 40723390), (4, 20361695), (5, 16289356), (10, 8144678), (20, 4072339), (499, 163220), (998, 81610), (1996, 40805), (2495, 32644), (4990, 16322), (8161, 9980)]