19201581

素因数分解:

$3^2\times 7^2\times {\mathrm{43541}}^1$

素因数の和:43561

約数の個数: 18

約数和(自身を含む): 32264622

約数和(自身を除く): 13063041

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 43541, 130623, 304787, 391869, 914361, 2133509, 2743083, 6400527, 19201581]

約数ペア:

[(1, 19201581), (3, 6400527), (7, 2743083), (9, 2133509), (21, 914361), (49, 391869), (63, 304787), (147, 130623), (441, 43541)]