20881278

素因数分解:

$2^1\times 3^2\times {\mathrm{11}}^1\times {\mathrm{163}}^1\times {\mathrm{647}}^1$

素因数の和:829

約数の個数: 48

約数和(自身を含む): 49735296

約数和(自身を除く): 28854018

約数列:

[1, 2, 3, 6, 9, 11, 18, 22, 33, 66, 99, 163, 198, 326, 489, 647, 978, 1294, 1467, 1793, 1941, 2934, 3586, 3882, 5379, 5823, 7117, 10758, 11646, 14234, 16137, 21351, 32274, 42702, 64053, 105461, 128106, 210922, 316383, 632766, 949149, 1160071, 1898298, 2320142, 3480213, 6960426, 10440639, 20881278]

約数ペア:

[(1, 20881278), (2, 10440639), (3, 6960426), (6, 3480213), (9, 2320142), (11, 1898298), (18, 1160071), (22, 949149), (33, 632766), (66, 316383), (99, 210922), (163, 128106), (198, 105461), (326, 64053), (489, 42702), (647, 32274), (978, 21351), (1294, 16137), (1467, 14234), (1793, 11646), (1941, 10758), (2934, 7117), (3586, 5823), (3882, 5379)]