21387394

素因数分解:

$2^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{73}}^1\times {\mathrm{1231}}^1$

素因数の和:1330

約数の個数: 32

約数和(自身を含む): 39384576

約数和(自身を除く): 17997182

約数列:

[1, 2, 7, 14, 17, 34, 73, 119, 146, 238, 511, 1022, 1231, 1241, 2462, 2482, 8617, 8687, 17234, 17374, 20927, 41854, 89863, 146489, 179726, 292978, 629041, 1258082, 1527671, 3055342, 10693697, 21387394]

約数ペア:

[(1, 21387394), (2, 10693697), (7, 3055342), (14, 1527671), (17, 1258082), (34, 629041), (73, 292978), (119, 179726), (146, 146489), (238, 89863), (511, 41854), (1022, 20927), (1231, 17374), (1241, 17234), (2462, 8687), (2482, 8617)]