21927820

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{97}}^1\times {\mathrm{127}}^1$

素因数の和:322

約数の個数: 48

約数和(自身を含む): 47416320

約数和(自身を除く): 25488500

約数列:

[1, 2, 4, 5, 10, 20, 89, 97, 127, 178, 194, 254, 356, 388, 445, 485, 508, 635, 890, 970, 1270, 1780, 1940, 2540, 8633, 11303, 12319, 17266, 22606, 24638, 34532, 43165, 45212, 49276, 56515, 61595, 86330, 113030, 123190, 172660, 226060, 246380, 1096391, 2192782, 4385564, 5481955, 10963910, 21927820]

約数ペア:

[(1, 21927820), (2, 10963910), (4, 5481955), (5, 4385564), (10, 2192782), (20, 1096391), (89, 246380), (97, 226060), (127, 172660), (178, 123190), (194, 113030), (254, 86330), (356, 61595), (388, 56515), (445, 49276), (485, 45212), (508, 43165), (635, 34532), (890, 24638), (970, 22606), (1270, 17266), (1780, 12319), (1940, 11303), (2540, 8633)]