19997356

素因数分解:

$2^2\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{67}}^1\times {\mathrm{83}}^1$

素因数の和:214

約数の個数: 48

約数和(自身を含む): 38384640

約数和(自身を除く): 18387284

約数列:

[1, 2, 4, 29, 31, 58, 62, 67, 83, 116, 124, 134, 166, 268, 332, 899, 1798, 1943, 2077, 2407, 2573, 3596, 3886, 4154, 4814, 5146, 5561, 7772, 8308, 9628, 10292, 11122, 22244, 60233, 74617, 120466, 149234, 161269, 172391, 240932, 298468, 322538, 344782, 645076, 689564, 4999339, 9998678, 19997356]

約数ペア:

[(1, 19997356), (2, 9998678), (4, 4999339), (29, 689564), (31, 645076), (58, 344782), (62, 322538), (67, 298468), (83, 240932), (116, 172391), (124, 161269), (134, 149234), (166, 120466), (268, 74617), (332, 60233), (899, 22244), (1798, 11122), (1943, 10292), (2077, 9628), (2407, 8308), (2573, 7772), (3596, 5561), (3886, 5146), (4154, 4814)]