19978948

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{9661}}^1$

素因数の和:9723

約数の個数: 24

約数和(自身を含む): 38957184

約数和(自身を除く): 18978236

約数列:

[1, 2, 4, 11, 22, 44, 47, 94, 188, 517, 1034, 2068, 9661, 19322, 38644, 106271, 212542, 425084, 454067, 908134, 1816268, 4994737, 9989474, 19978948]

約数ペア:

[(1, 19978948), (2, 9989474), (4, 4994737), (11, 1816268), (22, 908134), (44, 454067), (47, 425084), (94, 212542), (188, 106271), (517, 38644), (1034, 19322), (2068, 9661)]