21254578

素因数分解:

$2^1\times {\mathrm{19}}^1\times {\mathrm{313}}^1\times {\mathrm{1787}}^1$

素因数の和:2121

約数の個数: 16

約数和(自身を含む): 33685920

約数和(自身を除く): 12431342

約数列:

[1, 2, 19, 38, 313, 626, 1787, 3574, 5947, 11894, 33953, 67906, 559331, 1118662, 10627289, 21254578]

約数ペア:

[(1, 21254578), (2, 10627289), (19, 1118662), (38, 559331), (313, 67906), (626, 33953), (1787, 11894), (3574, 5947)]