19784515

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{5413}}^1$

素因数の和:5478

約数の個数: 16

約数和(自身を含む): 25727328

約数和(自身を除く): 5942813

約数列:

[1, 5, 17, 43, 85, 215, 731, 3655, 5413, 27065, 92021, 232759, 460105, 1163795, 3956903, 19784515]

約数ペア:

[(1, 19784515), (5, 3956903), (17, 1163795), (43, 460105), (85, 232759), (215, 92021), (731, 27065), (3655, 5413)]