20720777

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{1039}}^1$

素因数の和:1101

約数の個数: 24

約数和(自身を含む): 27031680

約数和(自身を除く): 6310903

約数列:

[1, 7, 11, 37, 49, 77, 259, 407, 539, 1039, 1813, 2849, 7273, 11429, 19943, 38443, 50911, 80003, 269101, 422873, 560021, 1883707, 2960111, 20720777]

約数ペア:

[(1, 20720777), (7, 2960111), (11, 1883707), (37, 560021), (49, 422873), (77, 269101), (259, 80003), (407, 50911), (539, 38443), (1039, 19943), (1813, 11429), (2849, 7273)]