20899990

素因数分解:

$2^1\times 5^1\times {\mathrm{1213}}^1\times {\mathrm{1723}}^1$

素因数の和:2943

約数の個数: 16

約数和(自身を含む): 37672848

約数和(自身を除く): 16772858

約数列:

[1, 2, 5, 10, 1213, 1723, 2426, 3446, 6065, 8615, 12130, 17230, 2089999, 4179998, 10449995, 20899990]

約数ペア:

[(1, 20899990), (2, 10449995), (5, 4179998), (10, 2089999), (1213, 17230), (1723, 12130), (2426, 8615), (3446, 6065)]