20921865

素因数分解:

$3^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{163}}^1\times {\mathrm{199}}^1$

素因数の和:413

約数の個数: 32

約数和(自身を含む): 34636800

約数和(自身を除く): 13714935

約数列:

[1, 3, 5, 15, 43, 129, 163, 199, 215, 489, 597, 645, 815, 995, 2445, 2985, 7009, 8557, 21027, 25671, 32437, 35045, 42785, 97311, 105135, 128355, 162185, 486555, 1394791, 4184373, 6973955, 20921865]

約数ペア:

[(1, 20921865), (3, 6973955), (5, 4184373), (15, 1394791), (43, 486555), (129, 162185), (163, 128355), (199, 105135), (215, 97311), (489, 42785), (597, 35045), (645, 32437), (815, 25671), (995, 21027), (2445, 8557), (2985, 7009)]