20121565

素因数分解:

$5^1\times {\mathrm{89}}^1\times {\mathrm{103}}^1\times {\mathrm{439}}^1$

素因数の和:636

約数の個数: 16

約数和(自身を含む): 24710400

約数和(自身を除く): 4588835

約数列:

[1, 5, 89, 103, 439, 445, 515, 2195, 9167, 39071, 45217, 45835, 195355, 226085, 4024313, 20121565]

約数ペア:

[(1, 20121565), (5, 4024313), (89, 226085), (103, 195355), (439, 45835), (445, 45217), (515, 39071), (2195, 9167)]