21520000

素因数分解:

$2^7\times 5^4\times {\mathrm{269}}^1$

素因数の和:303

約数の個数: 80

約数和(自身を含む): 53771850

約数和(自身を除く): 32251850

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 125, 128, 160, 200, 250, 269, 320, 400, 500, 538, 625, 640, 800, 1000, 1076, 1250, 1345, 1600, 2000, 2152, 2500, 2690, 3200, 4000, 4304, 5000, 5380, 6725, 8000, 8608, 10000, 10760, 13450, 16000, 17216, 20000, 21520, 26900, 33625, 34432, 40000, 43040, 53800, 67250, 80000, 86080, 107600, 134500, 168125, 172160, 215200, 269000, 336250, 430400, 538000, 672500, 860800, 1076000, 1345000, 2152000, 2690000, 4304000, 5380000, 10760000, 21520000]

約数ペア:

[(1, 21520000), (2, 10760000), (4, 5380000), (5, 4304000), (8, 2690000), (10, 2152000), (16, 1345000), (20, 1076000), (25, 860800), (32, 672500), (40, 538000), (50, 430400), (64, 336250), (80, 269000), (100, 215200), (125, 172160), (128, 168125), (160, 134500), (200, 107600), (250, 86080), (269, 80000), (320, 67250), (400, 53800), (500, 43040), (538, 40000), (625, 34432), (640, 33625), (800, 26900), (1000, 21520), (1076, 20000), (1250, 17216), (1345, 16000), (1600, 13450), (2000, 10760), (2152, 10000), (2500, 8608), (2690, 8000), (3200, 6725), (4000, 5380), (4304, 5000)]