21199960

素因数分解:

$2^3\times 5^1\times {\mathrm{529999}}^1$

素因数の和:530010

約数の個数: 16

約数和(自身を含む): 47700000

約数和(自身を除く): 26500040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 529999, 1059998, 2119996, 2649995, 4239992, 5299990, 10599980, 21199960]

約数ペア:

[(1, 21199960), (2, 10599980), (4, 5299990), (5, 4239992), (8, 2649995), (10, 2119996), (20, 1059998), (40, 529999)]