19879574

素因数分解:

$2^1\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{89}}^1$

素因数の和:197

約数の個数: 48

約数和(自身を含む): 36197280

約数和(自身を除く): 16317706

約数列:

[1, 2, 11, 13, 22, 26, 71, 89, 121, 142, 143, 178, 242, 286, 781, 923, 979, 1157, 1562, 1573, 1846, 1958, 2314, 3146, 6319, 8591, 10153, 10769, 12638, 12727, 17182, 20306, 21538, 25454, 69509, 82147, 111683, 139018, 139997, 164294, 223366, 279994, 764599, 903617, 1529198, 1807234, 9939787, 19879574]

約数ペア:

[(1, 19879574), (2, 9939787), (11, 1807234), (13, 1529198), (22, 903617), (26, 764599), (71, 279994), (89, 223366), (121, 164294), (142, 139997), (143, 139018), (178, 111683), (242, 82147), (286, 69509), (781, 25454), (923, 21538), (979, 20306), (1157, 17182), (1562, 12727), (1573, 12638), (1846, 10769), (1958, 10153), (2314, 8591), (3146, 6319)]