20910309

素因数分解:

$3^1\times 7^4\times {\mathrm{2903}}^1$

素因数の和:2934

約数の個数: 20

約数和(自身を含む): 32536416

約数和(自身を除く): 11626107

約数列:

[1, 3, 7, 21, 49, 147, 343, 1029, 2401, 2903, 7203, 8709, 20321, 60963, 142247, 426741, 995729, 2987187, 6970103, 20910309]

約数ペア:

[(1, 20910309), (3, 6970103), (7, 2987187), (21, 995729), (49, 426741), (147, 142247), (343, 60963), (1029, 20321), (2401, 8709), (2903, 7203)]