19987474

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{79}}^1\times {\mathrm{263}}^1$

素因数の和:394

約数の個数: 32

約数和(自身を含む): 33707520

約数和(自身を除く): 13720046

約数列:

[1, 2, 13, 26, 37, 74, 79, 158, 263, 481, 526, 962, 1027, 2054, 2923, 3419, 5846, 6838, 9731, 19462, 20777, 37999, 41554, 75998, 126503, 253006, 270101, 540202, 768749, 1537498, 9993737, 19987474]

約数ペア:

[(1, 19987474), (2, 9993737), (13, 1537498), (26, 768749), (37, 540202), (74, 270101), (79, 253006), (158, 126503), (263, 75998), (481, 41554), (526, 37999), (962, 20777), (1027, 19462), (2054, 9731), (2923, 6838), (3419, 5846)]