81521636

素因数分解:

$2^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{67709}}^1$

素因数の和:67763

約数の個数: 24

約数和(自身を含む): 166837440

約数和(自身を除く): 85315804

約数列:

[1, 2, 4, 7, 14, 28, 43, 86, 172, 301, 602, 1204, 67709, 135418, 270836, 473963, 947926, 1895852, 2911487, 5822974, 11645948, 20380409, 40760818, 81521636]

約数ペア:

[(1, 81521636), (2, 40760818), (4, 20380409), (7, 11645948), (14, 5822974), (28, 2911487), (43, 1895852), (86, 947926), (172, 473963), (301, 270836), (602, 135418), (1204, 67709)]