21255970

素因数分解:

$2^1\times 5^1\times {\mathrm{433}}^1\times {\mathrm{4909}}^1$

素因数の和:5349

約数の個数: 16

約数和(自身を含む): 38356920

約数和(自身を除く): 17100950

約数列:

[1, 2, 5, 10, 433, 866, 2165, 4330, 4909, 9818, 24545, 49090, 2125597, 4251194, 10627985, 21255970]

約数ペア:

[(1, 21255970), (2, 10627985), (5, 4251194), (10, 2125597), (433, 49090), (866, 24545), (2165, 9818), (4330, 4909)]