81220840

素因数分解:

$2^3\times 5^1\times {\mathrm{191}}^1\times {\mathrm{10631}}^1$

素因数の和:10833

約数の個数: 32

約数和(自身を含む): 183720960

約数和(自身を除く): 102500120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 191, 382, 764, 955, 1528, 1910, 3820, 7640, 10631, 21262, 42524, 53155, 85048, 106310, 212620, 425240, 2030521, 4061042, 8122084, 10152605, 16244168, 20305210, 40610420, 81220840]

約数ペア:

[(1, 81220840), (2, 40610420), (4, 20305210), (5, 16244168), (8, 10152605), (10, 8122084), (20, 4061042), (40, 2030521), (191, 425240), (382, 212620), (764, 106310), (955, 85048), (1528, 53155), (1910, 42524), (3820, 21262), (7640, 10631)]