639814

素因数分解:

$2^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{1987}}^1$

素因数の和:2019

約数の個数: 16

約数和(自身を含む): 1145088

約数和(自身を除く): 505274

約数列:

[1, 2, 7, 14, 23, 46, 161, 322, 1987, 3974, 13909, 27818, 45701, 91402, 319907, 639814]

約数ペア:

[(1, 639814), (2, 319907), (7, 91402), (14, 45701), (23, 27818), (46, 13909), (161, 3974), (322, 1987)]