20484620

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{78787}}^1$

素因数の和:78809

約数の個数: 24

約数和(自身を含む): 46327344

約数和(自身を除く): 25842724

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 78787, 157574, 315148, 393935, 787870, 1024231, 1575740, 2048462, 4096924, 5121155, 10242310, 20484620]

約数ペア:

[(1, 20484620), (2, 10242310), (4, 5121155), (5, 4096924), (10, 2048462), (13, 1575740), (20, 1024231), (26, 787870), (52, 393935), (65, 315148), (130, 157574), (260, 78787)]