20464000

素因数分解:

$2^7\times 5^3\times {\mathrm{1279}}^1$

素因数の和:1308

約数の個数: 64

約数和(自身を含む): 50918400

約数和(自身を除く): 30454400

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 125, 128, 160, 200, 250, 320, 400, 500, 640, 800, 1000, 1279, 1600, 2000, 2558, 3200, 4000, 5116, 6395, 8000, 10232, 12790, 16000, 20464, 25580, 31975, 40928, 51160, 63950, 81856, 102320, 127900, 159875, 163712, 204640, 255800, 319750, 409280, 511600, 639500, 818560, 1023200, 1279000, 2046400, 2558000, 4092800, 5116000, 10232000, 20464000]

約数ペア:

[(1, 20464000), (2, 10232000), (4, 5116000), (5, 4092800), (8, 2558000), (10, 2046400), (16, 1279000), (20, 1023200), (25, 818560), (32, 639500), (40, 511600), (50, 409280), (64, 319750), (80, 255800), (100, 204640), (125, 163712), (128, 159875), (160, 127900), (200, 102320), (250, 81856), (320, 63950), (400, 51160), (500, 40928), (640, 31975), (800, 25580), (1000, 20464), (1279, 16000), (1600, 12790), (2000, 10232), (2558, 8000), (3200, 6395), (4000, 5116)]