78848080

素因数分解:

$2^4\times 5^1\times {\mathrm{985601}}^1$

素因数の和:985614

約数の個数: 20

約数和(自身を含む): 183321972

約数和(自身を除く): 104473892

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 985601, 1971202, 3942404, 4928005, 7884808, 9856010, 15769616, 19712020, 39424040, 78848080]

約数ペア:

[(1, 78848080), (2, 39424040), (4, 19712020), (5, 15769616), (8, 9856010), (10, 7884808), (16, 4928005), (20, 3942404), (40, 1971202), (80, 985601)]