20818091

素因数分解:

$7^2\times {\mathrm{19}}^1\times {\mathrm{59}}^1\times {\mathrm{379}}^1$

素因数の和:471

約数の個数: 24

約数和(自身を含む): 25992000

約数和(自身を除く): 5173909

約数列:

[1, 7, 19, 49, 59, 133, 379, 413, 931, 1121, 2653, 2891, 7201, 7847, 18571, 22361, 50407, 54929, 156527, 352849, 424859, 1095689, 2974013, 20818091]

約数ペア:

[(1, 20818091), (7, 2974013), (19, 1095689), (49, 424859), (59, 352849), (133, 156527), (379, 54929), (413, 50407), (931, 22361), (1121, 18571), (2653, 7847), (2891, 7201)]