19866891

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{53}}^1\times {\mathrm{307}}^1$

素因数の和:411

約数の個数: 32

約数和(自身を含む): 30336768

約数和(自身を除く): 10469877

約数列:

[1, 3, 11, 33, 37, 53, 111, 159, 307, 407, 583, 921, 1221, 1749, 1961, 3377, 5883, 10131, 11359, 16271, 21571, 34077, 48813, 64713, 124949, 178981, 374847, 536943, 602027, 1806081, 6622297, 19866891]

約数ペア:

[(1, 19866891), (3, 6622297), (11, 1806081), (33, 602027), (37, 536943), (53, 374847), (111, 178981), (159, 124949), (307, 64713), (407, 48813), (583, 34077), (921, 21571), (1221, 16271), (1749, 11359), (1961, 10131), (3377, 5883)]