20819211

素因数分解:

$3^1\times 7^1\times {\mathrm{971}}^1\times {\mathrm{1021}}^1$

素因数の和:2002

約数の個数: 16

約数和(自身を含む): 31788288

約数和(自身を除く): 10969077

約数列:

[1, 3, 7, 21, 971, 1021, 2913, 3063, 6797, 7147, 20391, 21441, 991391, 2974173, 6939737, 20819211]

約数ペア:

[(1, 20819211), (3, 6939737), (7, 2974173), (21, 991391), (971, 21441), (1021, 20391), (2913, 7147), (3063, 6797)]