20986678

素因数分解:

$2^1\times {\mathrm{19}}^1\times {\mathrm{67}}^1\times {\mathrm{8243}}^1$

素因数の和:8331

約数の個数: 16

約数和(自身を含む): 33635520

約数和(自身を除く): 12648842

約数列:

[1, 2, 19, 38, 67, 134, 1273, 2546, 8243, 16486, 156617, 313234, 552281, 1104562, 10493339, 20986678]

約数ペア:

[(1, 20986678), (2, 10493339), (19, 1104562), (38, 552281), (67, 313234), (134, 156617), (1273, 16486), (2546, 8243)]