20405991

素因数分解:

$3^1\times {\mathrm{23}}^1\times {\mathrm{433}}^1\times {\mathrm{683}}^1$

素因数の和:1142

約数の個数: 16

約数和(自身を含む): 28498176

約数和(自身を除く): 8092185

約数列:

[1, 3, 23, 69, 433, 683, 1299, 2049, 9959, 15709, 29877, 47127, 295739, 887217, 6801997, 20405991]

約数ペア:

[(1, 20405991), (3, 6801997), (23, 887217), (69, 295739), (433, 47127), (683, 29877), (1299, 15709), (2049, 9959)]