20857780

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{45343}}^1$

素因数の和:45375

約数の個数: 24

約数和(自身を含む): 45706752

約数和(自身を除く): 24848972

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 92, 115, 230, 460, 45343, 90686, 181372, 226715, 453430, 906860, 1042889, 2085778, 4171556, 5214445, 10428890, 20857780]

約数ペア:

[(1, 20857780), (2, 10428890), (4, 5214445), (5, 4171556), (10, 2085778), (20, 1042889), (23, 906860), (46, 453430), (92, 226715), (115, 181372), (230, 90686), (460, 45343)]