81304720

素因数分解:

$2^4\times 5^1\times 7^3\times {\mathrm{2963}}^1$

素因数の和:2997

約数の個数: 80

約数和(自身を含む): 220521600

約数和(自身を除く): 139216880

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 49, 56, 70, 80, 98, 112, 140, 196, 245, 280, 343, 392, 490, 560, 686, 784, 980, 1372, 1715, 1960, 2744, 2963, 3430, 3920, 5488, 5926, 6860, 11852, 13720, 14815, 20741, 23704, 27440, 29630, 41482, 47408, 59260, 82964, 103705, 118520, 145187, 165928, 207410, 237040, 290374, 331856, 414820, 580748, 725935, 829640, 1016309, 1161496, 1451870, 1659280, 2032618, 2322992, 2903740, 4065236, 5081545, 5807480, 8130472, 10163090, 11614960, 16260944, 20326180, 40652360, 81304720]

約数ペア:

[(1, 81304720), (2, 40652360), (4, 20326180), (5, 16260944), (7, 11614960), (8, 10163090), (10, 8130472), (14, 5807480), (16, 5081545), (20, 4065236), (28, 2903740), (35, 2322992), (40, 2032618), (49, 1659280), (56, 1451870), (70, 1161496), (80, 1016309), (98, 829640), (112, 725935), (140, 580748), (196, 414820), (245, 331856), (280, 290374), (343, 237040), (392, 207410), (490, 165928), (560, 145187), (686, 118520), (784, 103705), (980, 82964), (1372, 59260), (1715, 47408), (1960, 41482), (2744, 29630), (2963, 27440), (3430, 23704), (3920, 20741), (5488, 14815), (5926, 13720), (6860, 11852)]