16531780

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{409}}^1$

素因数の和:508

約数の個数: 48

約数和(自身を含む): 36368640

約数和(自身を除く): 19836860

約数列:

[1, 2, 4, 5, 10, 20, 43, 47, 86, 94, 172, 188, 215, 235, 409, 430, 470, 818, 860, 940, 1636, 2021, 2045, 4042, 4090, 8084, 8180, 10105, 17587, 19223, 20210, 35174, 38446, 40420, 70348, 76892, 87935, 96115, 175870, 192230, 351740, 384460, 826589, 1653178, 3306356, 4132945, 8265890, 16531780]

約数ペア:

[(1, 16531780), (2, 8265890), (4, 4132945), (5, 3306356), (10, 1653178), (20, 826589), (43, 384460), (47, 351740), (86, 192230), (94, 175870), (172, 96115), (188, 87935), (215, 76892), (235, 70348), (409, 40420), (430, 38446), (470, 35174), (818, 20210), (860, 19223), (940, 17587), (1636, 10105), (2021, 8180), (2045, 8084), (4042, 4090)]