640038434

素因数分解:

$2^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{1987697}}^1$

素因数の和:1987729

約数の個数: 16

約数和(自身を含む): 1144914048

約数和(自身を除く): 504875614

約数列:

[1, 2, 7, 14, 23, 46, 161, 322, 1987697, 3975394, 13913879, 27827758, 45717031, 91434062, 320019217, 640038434]

約数ペア:

[(1, 640038434), (2, 320019217), (7, 91434062), (14, 45717031), (23, 27827758), (46, 13913879), (161, 3975394), (322, 1987697)]