1256223087

素因数分解:

$3^4\times 7^1\times {\mathrm{2215561}}^1$

素因数の和:2215580

約数の個数: 20

約数和(自身を含む): 2144664016

約数和(自身を除く): 888440929

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 567, 2215561, 6646683, 15508927, 19940049, 46526781, 59820147, 139580343, 179460441, 418741029, 1256223087]

約数ペア:

[(1, 1256223087), (3, 418741029), (7, 179460441), (9, 139580343), (21, 59820147), (27, 46526781), (63, 19940049), (81, 15508927), (189, 6646683), (567, 2215561)]