20988615

素因数分解:

$3^1\times 5^1\times {\mathrm{509}}^1\times {\mathrm{2749}}^1$

素因数の和:3266

約数の個数: 16

約数和(自身を含む): 33660000

約数和(自身を除く): 12671385

約数列:

[1, 3, 5, 15, 509, 1527, 2545, 2749, 7635, 8247, 13745, 41235, 1399241, 4197723, 6996205, 20988615]

約数ペア:

[(1, 20988615), (3, 6996205), (5, 4197723), (15, 1399241), (509, 41235), (1527, 13745), (2545, 8247), (2749, 7635)]