649307440

素因数分解:

$2^4\times 5^1\times {\mathrm{2087}}^1\times {\mathrm{3889}}^1$

素因数の和:5989

約数の個数: 40

約数和(自身を含む): 1510751520

約数和(自身を除く): 861444080

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 2087, 3889, 4174, 7778, 8348, 10435, 15556, 16696, 19445, 20870, 31112, 33392, 38890, 41740, 62224, 77780, 83480, 155560, 166960, 311120, 8116343, 16232686, 32465372, 40581715, 64930744, 81163430, 129861488, 162326860, 324653720, 649307440]

約数ペア:

[(1, 649307440), (2, 324653720), (4, 162326860), (5, 129861488), (8, 81163430), (10, 64930744), (16, 40581715), (20, 32465372), (40, 16232686), (80, 8116343), (2087, 311120), (3889, 166960), (4174, 155560), (7778, 83480), (8348, 77780), (10435, 62224), (15556, 41740), (16696, 38890), (19445, 33392), (20870, 31112)]