20921805

素因数分解:

$3^2\times 5^1\times {\mathrm{151}}^1\times {\mathrm{3079}}^1$

素因数の和:3241

約数の個数: 24

約数和(自身を含む): 36516480

約数和(自身を除く): 15594675

約数列:

[1, 3, 5, 9, 15, 45, 151, 453, 755, 1359, 2265, 3079, 6795, 9237, 15395, 27711, 46185, 138555, 464929, 1394787, 2324645, 4184361, 6973935, 20921805]

約数ペア:

[(1, 20921805), (3, 6973935), (5, 4184361), (9, 2324645), (15, 1394787), (45, 464929), (151, 138555), (453, 46185), (755, 27711), (1359, 15395), (2265, 9237), (3079, 6795)]