21198591

素因数分解:

$3^{10}\times {\mathrm{359}}^1$

素因数の和:389

約数の個数: 22

約数和(自身を含む): 31886280

約数和(自身を除く): 10687689

約数列:

[1, 3, 9, 27, 81, 243, 359, 729, 1077, 2187, 3231, 6561, 9693, 19683, 29079, 59049, 87237, 261711, 785133, 2355399, 7066197, 21198591]

約数ペア:

[(1, 21198591), (3, 7066197), (9, 2355399), (27, 785133), (81, 261711), (243, 87237), (359, 59049), (729, 29079), (1077, 19683), (2187, 9693), (3231, 6561)]