20911900

素因数分解:

$2^2\times 5^2\times {\mathrm{29}}^1\times {\mathrm{7211}}^1$

素因数の和:7254

約数の個数: 36

約数和(自身を含む): 46950120

約数和(自身を除く): 26038220

約数列:

[1, 2, 4, 5, 10, 20, 25, 29, 50, 58, 100, 116, 145, 290, 580, 725, 1450, 2900, 7211, 14422, 28844, 36055, 72110, 144220, 180275, 209119, 360550, 418238, 721100, 836476, 1045595, 2091190, 4182380, 5227975, 10455950, 20911900]

約数ペア:

[(1, 20911900), (2, 10455950), (4, 5227975), (5, 4182380), (10, 2091190), (20, 1045595), (25, 836476), (29, 721100), (50, 418238), (58, 360550), (100, 209119), (116, 180275), (145, 144220), (290, 72110), (580, 36055), (725, 28844), (1450, 14422), (2900, 7211)]