78931280

素因数分解:

$2^4\times 5^1\times {\mathrm{986641}}^1$

素因数の和:986654

約数の個数: 20

約数和(自身を含む): 183515412

約数和(自身を除く): 104584132

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 986641, 1973282, 3946564, 4933205, 7893128, 9866410, 15786256, 19732820, 39465640, 78931280]

約数ペア:

[(1, 78931280), (2, 39465640), (4, 19732820), (5, 15786256), (8, 9866410), (10, 7893128), (16, 4933205), (20, 3946564), (40, 1973282), (80, 986641)]