20990128

素因数分解:

$2^4\times {\mathrm{73}}^1\times {\mathrm{17971}}^1$

素因数の和:18052

約数の個数: 20

約数和(自身を含む): 41227768

約数和(自身を除く): 20237640

約数列:

[1, 2, 4, 8, 16, 73, 146, 292, 584, 1168, 17971, 35942, 71884, 143768, 287536, 1311883, 2623766, 5247532, 10495064, 20990128]

約数ペア:

[(1, 20990128), (2, 10495064), (4, 5247532), (8, 2623766), (16, 1311883), (73, 287536), (146, 143768), (292, 71884), (584, 35942), (1168, 17971)]