638540

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{4561}}^1$

素因数の和:4577

約数の個数: 24

約数和(自身を含む): 1532832

約数和(自身を除く): 894292

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 4561, 9122, 18244, 22805, 31927, 45610, 63854, 91220, 127708, 159635, 319270, 638540]

約数ペア:

[(1, 638540), (2, 319270), (4, 159635), (5, 127708), (7, 91220), (10, 63854), (14, 45610), (20, 31927), (28, 22805), (35, 18244), (70, 9122), (140, 4561)]