20828247

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{137}}^1\times {\mathrm{271}}^1$

素因数の和:439

約数の個数: 32

約数和(自身を含む): 32431104

約数和(自身を除く): 11602857

約数列:

[1, 3, 11, 17, 33, 51, 137, 187, 271, 411, 561, 813, 1507, 2329, 2981, 4521, 4607, 6987, 8943, 13821, 25619, 37127, 50677, 76857, 111381, 152031, 408397, 631159, 1225191, 1893477, 6942749, 20828247]

約数ペア:

[(1, 20828247), (3, 6942749), (11, 1893477), (17, 1225191), (33, 631159), (51, 408397), (137, 152031), (187, 111381), (271, 76857), (411, 50677), (561, 37127), (813, 25619), (1507, 13821), (2329, 8943), (2981, 6987), (4521, 4607)]