81660390

素因数分解:

$2^1\times 3^1\times 5^1\times 7^1\times {\mathrm{388859}}^1$

素因数の和:388876

約数の個数: 32

約数和(自身を含む): 223983360

約数和(自身を除く): 142322970

約数列:

[1, 2, 3, 5, 6, 7, 10, 14, 15, 21, 30, 35, 42, 70, 105, 210, 388859, 777718, 1166577, 1944295, 2333154, 2722013, 3888590, 5444026, 5832885, 8166039, 11665770, 13610065, 16332078, 27220130, 40830195, 81660390]

約数ペア:

[(1, 81660390), (2, 40830195), (3, 27220130), (5, 16332078), (6, 13610065), (7, 11665770), (10, 8166039), (14, 5832885), (15, 5444026), (21, 3888590), (30, 2722013), (35, 2333154), (42, 1944295), (70, 1166577), (105, 777718), (210, 388859)]