20128465

素因数分解:

$5^1\times 7^2\times {\mathrm{29}}^1\times {\mathrm{2833}}^1$

素因数の和:2881

約数の個数: 24

約数和(自身を含む): 29076840

約数和(自身を除く): 8948375

約数列:

[1, 5, 7, 29, 35, 49, 145, 203, 245, 1015, 1421, 2833, 7105, 14165, 19831, 82157, 99155, 138817, 410785, 575099, 694085, 2875495, 4025693, 20128465]

約数ペア:

[(1, 20128465), (5, 4025693), (7, 2875495), (29, 694085), (35, 575099), (49, 410785), (145, 138817), (203, 99155), (245, 82157), (1015, 19831), (1421, 14165), (2833, 7105)]