20990937

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{17}}^2\times {\mathrm{31}}^1\times {\mathrm{71}}^1$

素因数の和:150

約数の個数: 48

約数和(自身を含む): 33951744

約数和(自身を除く): 12960807

約数列:

[1, 3, 11, 17, 31, 33, 51, 71, 93, 187, 213, 289, 341, 527, 561, 781, 867, 1023, 1207, 1581, 2201, 2343, 3179, 3621, 5797, 6603, 8959, 9537, 13277, 17391, 20519, 24211, 26877, 37417, 39831, 61557, 72633, 98549, 112251, 225709, 295647, 411587, 636089, 677127, 1234761, 1908267, 6996979, 20990937]

約数ペア:

[(1, 20990937), (3, 6996979), (11, 1908267), (17, 1234761), (31, 677127), (33, 636089), (51, 411587), (71, 295647), (93, 225709), (187, 112251), (213, 98549), (289, 72633), (341, 61557), (527, 39831), (561, 37417), (781, 26877), (867, 24211), (1023, 20519), (1207, 17391), (1581, 13277), (2201, 9537), (2343, 8959), (3179, 6603), (3621, 5797)]