65538680

素因数分解:

$2^3\times 5^1\times {\mathrm{47}}^1\times {\mathrm{71}}^1\times {\mathrm{491}}^1$

素因数の和:620

約数の個数: 64

約数和(自身を含む): 153031680

約数和(自身を除く): 87493000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 47, 71, 94, 142, 188, 235, 284, 355, 376, 470, 491, 568, 710, 940, 982, 1420, 1880, 1964, 2455, 2840, 3337, 3928, 4910, 6674, 9820, 13348, 16685, 19640, 23077, 26696, 33370, 34861, 46154, 66740, 69722, 92308, 115385, 133480, 139444, 174305, 184616, 230770, 278888, 348610, 461540, 697220, 923080, 1394440, 1638467, 3276934, 6553868, 8192335, 13107736, 16384670, 32769340, 65538680]

約数ペア:

[(1, 65538680), (2, 32769340), (4, 16384670), (5, 13107736), (8, 8192335), (10, 6553868), (20, 3276934), (40, 1638467), (47, 1394440), (71, 923080), (94, 697220), (142, 461540), (188, 348610), (235, 278888), (284, 230770), (355, 184616), (376, 174305), (470, 139444), (491, 133480), (568, 115385), (710, 92308), (940, 69722), (982, 66740), (1420, 46154), (1880, 34861), (1964, 33370), (2455, 26696), (2840, 23077), (3337, 19640), (3928, 16685), (4910, 13348), (6674, 9820)]