21376484

素因数分解:

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

素因数の和:216

約数の個数: 36

約数和(自身を含む): 39704112

約数和(自身を除く): 18327628

約数列:

[1, 2, 4, 31, 62, 67, 83, 124, 134, 166, 268, 332, 961, 1922, 2077, 2573, 3844, 4154, 5146, 5561, 8308, 10292, 11122, 22244, 64387, 79763, 128774, 159526, 172391, 257548, 319052, 344782, 689564, 5344121, 10688242, 21376484]

約数ペア:

[(1, 21376484), (2, 10688242), (4, 5344121), (31, 689564), (62, 344782), (67, 319052), (83, 257548), (124, 172391), (134, 159526), (166, 128774), (268, 79763), (332, 64387), (961, 22244), (1922, 11122), (2077, 10292), (2573, 8308), (3844, 5561), (4154, 5146)]