81811960

素因数分解:

$2^3\times 5^1\times {\mathrm{47}}^1\times {\mathrm{43517}}^1$

素因数の和:43575

約数の個数: 32

約数和(自身を含む): 187997760

約数和(自身を除く): 106185800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 47, 94, 188, 235, 376, 470, 940, 1880, 43517, 87034, 174068, 217585, 348136, 435170, 870340, 1740680, 2045299, 4090598, 8181196, 10226495, 16362392, 20452990, 40905980, 81811960]

約数ペア:

[(1, 81811960), (2, 40905980), (4, 20452990), (5, 16362392), (8, 10226495), (10, 8181196), (20, 4090598), (40, 2045299), (47, 1740680), (94, 870340), (188, 435170), (235, 348136), (376, 217585), (470, 174068), (940, 87034), (1880, 43517)]