165640

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{101}}^1$

素因数の和:153

約数の個数: 32

約数和(自身を含む): 385560

約数和(自身を除く): 219920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 101, 164, 202, 205, 328, 404, 410, 505, 808, 820, 1010, 1640, 2020, 4040, 4141, 8282, 16564, 20705, 33128, 41410, 82820, 165640]

約数ペア:

[(1, 165640), (2, 82820), (4, 41410), (5, 33128), (8, 20705), (10, 16564), (20, 8282), (40, 4141), (41, 4040), (82, 2020), (101, 1640), (164, 1010), (202, 820), (205, 808), (328, 505), (404, 410)]