20991248

素因数分解:

$2^4\times {\mathrm{79}}^1\times {\mathrm{16607}}^1$

素因数の和:16694

約数の個数: 20

約数和(自身を含む): 41187840

約数和(自身を除く): 20196592

約数列:

[1, 2, 4, 8, 16, 79, 158, 316, 632, 1264, 16607, 33214, 66428, 132856, 265712, 1311953, 2623906, 5247812, 10495624, 20991248]

約数ペア:

[(1, 20991248), (2, 10495624), (4, 5247812), (8, 2623906), (16, 1311953), (79, 265712), (158, 132856), (316, 66428), (632, 33214), (1264, 16607)]