20907980

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{55021}}^1$

素因数の和:55049

約数の個数: 24

約数和(自身を含む): 46218480

約数和(自身を除く): 25310500

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380, 55021, 110042, 220084, 275105, 550210, 1045399, 1100420, 2090798, 4181596, 5226995, 10453990, 20907980]

約数ペア:

[(1, 20907980), (2, 10453990), (4, 5226995), (5, 4181596), (10, 2090798), (19, 1100420), (20, 1045399), (38, 550210), (76, 275105), (95, 220084), (190, 110042), (380, 55021)]