19986280

素因数分解:

$2^3\times 5^1\times {\mathrm{47}}^1\times {\mathrm{10631}}^1$

素因数の和:10689

約数の個数: 32

約数和(自身を含む): 45930240

約数和(自身を除く): 25943960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 47, 94, 188, 235, 376, 470, 940, 1880, 10631, 21262, 42524, 53155, 85048, 106310, 212620, 425240, 499657, 999314, 1998628, 2498285, 3997256, 4996570, 9993140, 19986280]

約数ペア:

[(1, 19986280), (2, 9993140), (4, 4996570), (5, 3997256), (8, 2498285), (10, 1998628), (20, 999314), (40, 499657), (47, 425240), (94, 212620), (188, 106310), (235, 85048), (376, 53155), (470, 42524), (940, 21262), (1880, 10631)]