78178520

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{39887}}^1$

素因数の和:39912

約数の個数: 48

約数和(自身を含む): 204625440

約数和(自身を除く): 126446920

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 70, 98, 140, 196, 245, 280, 392, 490, 980, 1960, 39887, 79774, 159548, 199435, 279209, 319096, 398870, 558418, 797740, 1116836, 1396045, 1595480, 1954463, 2233672, 2792090, 3908926, 5584180, 7817852, 9772315, 11168360, 15635704, 19544630, 39089260, 78178520]

約数ペア:

[(1, 78178520), (2, 39089260), (4, 19544630), (5, 15635704), (7, 11168360), (8, 9772315), (10, 7817852), (14, 5584180), (20, 3908926), (28, 2792090), (35, 2233672), (40, 1954463), (49, 1595480), (56, 1396045), (70, 1116836), (98, 797740), (140, 558418), (196, 398870), (245, 319096), (280, 279209), (392, 199435), (490, 159548), (980, 79774), (1960, 39887)]