20925961

素因数分解:

$7^1\times {\mathrm{31}}^1\times {\mathrm{73}}^1\times {\mathrm{1321}}^1$

素因数の和:1432

約数の個数: 16

約数和(自身を含む): 25043968

約数和(自身を除く): 4118007

約数列:

[1, 7, 31, 73, 217, 511, 1321, 2263, 9247, 15841, 40951, 96433, 286657, 675031, 2989423, 20925961]

約数ペア:

[(1, 20925961), (7, 2989423), (31, 675031), (73, 286657), (217, 96433), (511, 40951), (1321, 15841), (2263, 9247)]