21485500

素因数分解:

$2^2\times 5^3\times {\mathrm{97}}^1\times {\mathrm{443}}^1$

素因数の和:559

約数の個数: 48

約数和(自身を含む): 47515104

約数和(自身を除く): 26029604

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 97, 100, 125, 194, 250, 388, 443, 485, 500, 886, 970, 1772, 1940, 2215, 2425, 4430, 4850, 8860, 9700, 11075, 12125, 22150, 24250, 42971, 44300, 48500, 55375, 85942, 110750, 171884, 214855, 221500, 429710, 859420, 1074275, 2148550, 4297100, 5371375, 10742750, 21485500]

約数ペア:

[(1, 21485500), (2, 10742750), (4, 5371375), (5, 4297100), (10, 2148550), (20, 1074275), (25, 859420), (50, 429710), (97, 221500), (100, 214855), (125, 171884), (194, 110750), (250, 85942), (388, 55375), (443, 48500), (485, 44300), (500, 42971), (886, 24250), (970, 22150), (1772, 12125), (1940, 11075), (2215, 9700), (2425, 8860), (4430, 4850)]