20216840

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{103}}^1\times {\mathrm{701}}^1$

素因数の和:822

約数の個数: 64

約数和(自身を含む): 52565760

約数和(自身を除く): 32348920

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 103, 140, 206, 280, 412, 515, 701, 721, 824, 1030, 1402, 1442, 2060, 2804, 2884, 3505, 3605, 4120, 4907, 5608, 5768, 7010, 7210, 9814, 14020, 14420, 19628, 24535, 28040, 28840, 39256, 49070, 72203, 98140, 144406, 196280, 288812, 361015, 505421, 577624, 722030, 1010842, 1444060, 2021684, 2527105, 2888120, 4043368, 5054210, 10108420, 20216840]

約数ペア:

[(1, 20216840), (2, 10108420), (4, 5054210), (5, 4043368), (7, 2888120), (8, 2527105), (10, 2021684), (14, 1444060), (20, 1010842), (28, 722030), (35, 577624), (40, 505421), (56, 361015), (70, 288812), (103, 196280), (140, 144406), (206, 98140), (280, 72203), (412, 49070), (515, 39256), (701, 28840), (721, 28040), (824, 24535), (1030, 19628), (1402, 14420), (1442, 14020), (2060, 9814), (2804, 7210), (2884, 7010), (3505, 5768), (3605, 5608), (4120, 4907)]