20505141

素因数分解:

$3^2\times {\mathrm{37}}^1\times {\mathrm{139}}^1\times {\mathrm{443}}^1$

素因数の和:625

約数の個数: 24

約数和(自身を含む): 30707040

約数和(自身を除く): 10201899

約数列:

[1, 3, 9, 37, 111, 139, 333, 417, 443, 1251, 1329, 3987, 5143, 15429, 16391, 46287, 49173, 61577, 147519, 184731, 554193, 2278349, 6835047, 20505141]

約数ペア:

[(1, 20505141), (3, 6835047), (9, 2278349), (37, 554193), (111, 184731), (139, 147519), (333, 61577), (417, 49173), (443, 46287), (1251, 16391), (1329, 15429), (3987, 5143)]