21067216

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{73}}^1\times {\mathrm{1061}}^1$

素因数の和:1159

約数の個数: 40

約数和(自身を含む): 43852104

約数和(自身を除く): 22784888

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 73, 136, 146, 272, 292, 584, 1061, 1168, 1241, 2122, 2482, 4244, 4964, 8488, 9928, 16976, 18037, 19856, 36074, 72148, 77453, 144296, 154906, 288592, 309812, 619624, 1239248, 1316701, 2633402, 5266804, 10533608, 21067216]

約数ペア:

[(1, 21067216), (2, 10533608), (4, 5266804), (8, 2633402), (16, 1316701), (17, 1239248), (34, 619624), (68, 309812), (73, 288592), (136, 154906), (146, 144296), (272, 77453), (292, 72148), (584, 36074), (1061, 19856), (1168, 18037), (1241, 16976), (2122, 9928), (2482, 8488), (4244, 4964)]