19977209

素因数分解:

$7^1\times {\mathrm{41}}^1\times {\mathrm{47}}^1\times {\mathrm{1481}}^1$

素因数の和:1576

約数の個数: 16

約数和(自身を含む): 23901696

約数和(自身を除く): 3924487

約数列:

[1, 7, 41, 47, 287, 329, 1481, 1927, 10367, 13489, 60721, 69607, 425047, 487249, 2853887, 19977209]

約数ペア:

[(1, 19977209), (7, 2853887), (41, 487249), (47, 425047), (287, 69607), (329, 60721), (1481, 13489), (1927, 10367)]