19707545

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{641}}^1$

素因数の和:713

約数の個数: 32

約数和(自身を含む): 28473984

約数和(自身を除く): 8766439

約数列:

[1, 5, 11, 13, 43, 55, 65, 143, 215, 473, 559, 641, 715, 2365, 2795, 3205, 6149, 7051, 8333, 27563, 30745, 35255, 41665, 91663, 137815, 303193, 358319, 458315, 1515965, 1791595, 3941509, 19707545]

約数ペア:

[(1, 19707545), (5, 3941509), (11, 1791595), (13, 1515965), (43, 458315), (55, 358319), (65, 303193), (143, 137815), (215, 91663), (473, 41665), (559, 35255), (641, 30745), (715, 27563), (2365, 8333), (2795, 7051), (3205, 6149)]