20518743

素因数分解:

$3^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{20789}}^1$

素因数の和:20846

約数の個数: 16

約数和(自身を含む): 31933440

約数和(自身を除く): 11414697

約数列:

[1, 3, 7, 21, 47, 141, 329, 987, 20789, 62367, 145523, 436569, 977083, 2931249, 6839581, 20518743]

約数ペア:

[(1, 20518743), (3, 6839581), (7, 2931249), (21, 977083), (47, 436569), (141, 145523), (329, 62367), (987, 20789)]