20406507

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{59}}^1\times {\mathrm{223}}^1$

素因数の和:343

約数の個数: 32

約数和(自身を含む): 30965760

約数和(自身を除く): 10559253

約数列:

[1, 3, 11, 33, 47, 59, 141, 177, 223, 517, 649, 669, 1551, 1947, 2453, 2773, 7359, 8319, 10481, 13157, 30503, 31443, 39471, 91509, 115291, 144727, 345873, 434181, 618379, 1855137, 6802169, 20406507]

約数ペア:

[(1, 20406507), (3, 6802169), (11, 1855137), (33, 618379), (47, 434181), (59, 345873), (141, 144727), (177, 115291), (223, 91509), (517, 39471), (649, 31443), (669, 30503), (1551, 13157), (1947, 10481), (2453, 8319), (2773, 7359)]