20891816

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{199}}^1\times {\mathrm{1193}}^1$

素因数の和:1409

約数の個数: 32

約数和(自身を含む): 42984000

約数和(自身を除く): 22092184

約数列:

[1, 2, 4, 8, 11, 22, 44, 88, 199, 398, 796, 1193, 1592, 2189, 2386, 4378, 4772, 8756, 9544, 13123, 17512, 26246, 52492, 104984, 237407, 474814, 949628, 1899256, 2611477, 5222954, 10445908, 20891816]

約数ペア:

[(1, 20891816), (2, 10445908), (4, 5222954), (8, 2611477), (11, 1899256), (22, 949628), (44, 474814), (88, 237407), (199, 104984), (398, 52492), (796, 26246), (1193, 17512), (1592, 13123), (2189, 9544), (2386, 8756), (4378, 4772)]