778968040

素因数分解:

$2^3\times 5^1\times {\mathrm{19474201}}^1$

素因数の和:19474212

約数の個数: 16

約数和(自身を含む): 1752678180

約数和(自身を除く): 973710140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 19474201, 38948402, 77896804, 97371005, 155793608, 194742010, 389484020, 778968040]

約数ペア:

[(1, 778968040), (2, 389484020), (4, 194742010), (5, 155793608), (8, 97371005), (10, 77896804), (20, 38948402), (40, 19474201)]