21113978

素因数分解:

$2^1\times {\mathrm{19}}^1\times {\mathrm{67}}^1\times {\mathrm{8293}}^1$

素因数の和:8381

約数の個数: 16

約数和(自身を含む): 33839520

約数和(自身を除く): 12725542

約数列:

[1, 2, 19, 38, 67, 134, 1273, 2546, 8293, 16586, 157567, 315134, 555631, 1111262, 10556989, 21113978]

約数ペア:

[(1, 21113978), (2, 10556989), (19, 1111262), (38, 555631), (67, 315134), (134, 157567), (1273, 16586), (2546, 8293)]