19987790

素因数分解:

$2^1\times 5^1\times {\mathrm{79}}^1\times {\mathrm{25301}}^1$

素因数の和:25387

約数の個数: 16

約数和(自身を含む): 36434880

約数和(自身を除く): 16447090

約数列:

[1, 2, 5, 10, 79, 158, 395, 790, 25301, 50602, 126505, 253010, 1998779, 3997558, 9993895, 19987790]

約数ペア:

[(1, 19987790), (2, 9993895), (5, 3997558), (10, 1998779), (79, 253010), (158, 126505), (395, 50602), (790, 25301)]