20321500

素因数分解:

$2^2\times 5^3\times {\mathrm{97}}^1\times {\mathrm{419}}^1$

素因数の和:535

約数の個数: 48

約数和(自身を含む): 44946720

約数和(自身を除く): 24625220

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 97, 100, 125, 194, 250, 388, 419, 485, 500, 838, 970, 1676, 1940, 2095, 2425, 4190, 4850, 8380, 9700, 10475, 12125, 20950, 24250, 40643, 41900, 48500, 52375, 81286, 104750, 162572, 203215, 209500, 406430, 812860, 1016075, 2032150, 4064300, 5080375, 10160750, 20321500]

約数ペア:

[(1, 20321500), (2, 10160750), (4, 5080375), (5, 4064300), (10, 2032150), (20, 1016075), (25, 812860), (50, 406430), (97, 209500), (100, 203215), (125, 162572), (194, 104750), (250, 81286), (388, 52375), (419, 48500), (485, 41900), (500, 40643), (838, 24250), (970, 20950), (1676, 12125), (1940, 10475), (2095, 9700), (2425, 8380), (4190, 4850)]