991408

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{131}}^1$

素因数の和:193

約数の個数: 40

約数和(自身を含む): 2160576

約数和(自身を除く): 1169168

約数列:

[1, 2, 4, 8, 11, 16, 22, 43, 44, 86, 88, 131, 172, 176, 262, 344, 473, 524, 688, 946, 1048, 1441, 1892, 2096, 2882, 3784, 5633, 5764, 7568, 11266, 11528, 22532, 23056, 45064, 61963, 90128, 123926, 247852, 495704, 991408]

約数ペア:

[(1, 991408), (2, 495704), (4, 247852), (8, 123926), (11, 90128), (16, 61963), (22, 45064), (43, 23056), (44, 22532), (86, 11528), (88, 11266), (131, 7568), (172, 5764), (176, 5633), (262, 3784), (344, 2882), (473, 2096), (524, 1892), (688, 1441), (946, 1048)]