20158551

素因数分解:

$3^5\times 7^2\times {\mathrm{1693}}^1$

素因数の和:1722

約数の個数: 36

約数和(自身を含む): 35147112

約数和(自身を除く): 14988561

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 81, 147, 189, 243, 441, 567, 1323, 1693, 1701, 3969, 5079, 11851, 11907, 15237, 35553, 45711, 82957, 106659, 137133, 248871, 319977, 411399, 746613, 959931, 2239839, 2879793, 6719517, 20158551]

約数ペア:

[(1, 20158551), (3, 6719517), (7, 2879793), (9, 2239839), (21, 959931), (27, 746613), (49, 411399), (63, 319977), (81, 248871), (147, 137133), (189, 106659), (243, 82957), (441, 45711), (567, 35553), (1323, 15237), (1693, 11907), (1701, 11851), (3969, 5079)]