20817797

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{2971}}^1$

素因数の和:3009

約数の個数: 24

約数和(自身を含む): 28459872

約数和(自身を除く): 7642075

約数列:

[1, 7, 11, 13, 49, 77, 91, 143, 539, 637, 1001, 2971, 7007, 20797, 32681, 38623, 145579, 228767, 270361, 424853, 1601369, 1892527, 2973971, 20817797]

約数ペア:

[(1, 20817797), (7, 2973971), (11, 1892527), (13, 1601369), (49, 424853), (77, 270361), (91, 228767), (143, 145579), (539, 38623), (637, 32681), (1001, 20797), (2971, 7007)]