20109940

素因数分解:

$2^2\times 5^1\times {\mathrm{503}}^1\times {\mathrm{1999}}^1$

素因数の和:2511

約数の個数: 24

約数和(自身を含む): 42336000

約数和(自身を除く): 22226060

約数列:

[1, 2, 4, 5, 10, 20, 503, 1006, 1999, 2012, 2515, 3998, 5030, 7996, 9995, 10060, 19990, 39980, 1005497, 2010994, 4021988, 5027485, 10054970, 20109940]

約数ペア:

[(1, 20109940), (2, 10054970), (4, 5027485), (5, 4021988), (10, 2010994), (20, 1005497), (503, 39980), (1006, 19990), (1999, 10060), (2012, 9995), (2515, 7996), (3998, 5030)]