21790000

素因数分解:

$2^4\times 5^4\times {\mathrm{2179}}^1$

素因数の和:2207

約数の個数: 50

約数和(自身を含む): 52779980

約数和(自身を除く): 30989980

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 200, 250, 400, 500, 625, 1000, 1250, 2000, 2179, 2500, 4358, 5000, 8716, 10000, 10895, 17432, 21790, 34864, 43580, 54475, 87160, 108950, 174320, 217900, 272375, 435800, 544750, 871600, 1089500, 1361875, 2179000, 2723750, 4358000, 5447500, 10895000, 21790000]

約数ペア:

[(1, 21790000), (2, 10895000), (4, 5447500), (5, 4358000), (8, 2723750), (10, 2179000), (16, 1361875), (20, 1089500), (25, 871600), (40, 544750), (50, 435800), (80, 272375), (100, 217900), (125, 174320), (200, 108950), (250, 87160), (400, 54475), (500, 43580), (625, 34864), (1000, 21790), (1250, 17432), (2000, 10895), (2179, 10000), (2500, 8716), (4358, 5000)]