21000880

素因数分解:

$2^4\times 5^1\times {\mathrm{262511}}^1$

素因数の和:262524

約数の個数: 20

約数和(自身を含む): 48827232

約数和(自身を除く): 27826352

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 262511, 525022, 1050044, 1312555, 2100088, 2625110, 4200176, 5250220, 10500440, 21000880]

約数ペア:

[(1, 21000880), (2, 10500440), (4, 5250220), (5, 4200176), (8, 2625110), (10, 2100088), (16, 1312555), (20, 1050044), (40, 525022), (80, 262511)]