19966791

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{101}}^1\times {\mathrm{137}}^1$

素因数の和:291

約数の個数: 32

約数和(自身を含む): 29953728

約数和(自身を除く): 9986937

約数列:

[1, 3, 13, 37, 39, 101, 111, 137, 303, 411, 481, 1313, 1443, 1781, 3737, 3939, 5069, 5343, 11211, 13837, 15207, 41511, 48581, 65897, 145743, 179881, 197691, 511969, 539643, 1535907, 6655597, 19966791]

約数ペア:

[(1, 19966791), (3, 6655597), (13, 1535907), (37, 539643), (39, 511969), (101, 197691), (111, 179881), (137, 145743), (303, 65897), (411, 48581), (481, 41511), (1313, 15207), (1443, 13837), (1781, 11211), (3737, 5343), (3939, 5069)]