21380000

素因数分解:

$2^5\times 5^4\times {\mathrm{1069}}^1$

素因数の和:1099

約数の個数: 60

約数和(自身を含む): 52647210

約数和(自身を除く): 31267210

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 125, 160, 200, 250, 400, 500, 625, 800, 1000, 1069, 1250, 2000, 2138, 2500, 4000, 4276, 5000, 5345, 8552, 10000, 10690, 17104, 20000, 21380, 26725, 34208, 42760, 53450, 85520, 106900, 133625, 171040, 213800, 267250, 427600, 534500, 668125, 855200, 1069000, 1336250, 2138000, 2672500, 4276000, 5345000, 10690000, 21380000]

約数ペア:

[(1, 21380000), (2, 10690000), (4, 5345000), (5, 4276000), (8, 2672500), (10, 2138000), (16, 1336250), (20, 1069000), (25, 855200), (32, 668125), (40, 534500), (50, 427600), (80, 267250), (100, 213800), (125, 171040), (160, 133625), (200, 106900), (250, 85520), (400, 53450), (500, 42760), (625, 34208), (800, 26725), (1000, 21380), (1069, 20000), (1250, 17104), (2000, 10690), (2138, 10000), (2500, 8552), (4000, 5345), (4276, 5000)]