18975957

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{89}}^1$

素因数の和:194

約数の個数: 64

約数和(自身を含む): 34836480

約数和(自身を除く): 15860523

約数列:

[1, 3, 7, 11, 13, 21, 33, 39, 71, 77, 89, 91, 143, 213, 231, 267, 273, 429, 497, 623, 781, 923, 979, 1001, 1157, 1491, 1869, 2343, 2769, 2937, 3003, 3471, 5467, 6319, 6461, 6853, 8099, 10153, 12727, 16401, 18957, 19383, 20559, 24297, 30459, 38181, 44233, 69509, 71071, 82147, 89089, 132699, 208527, 213213, 246441, 267267, 486563, 575029, 903617, 1459689, 1725087, 2710851, 6325319, 18975957]

約数ペア:

[(1, 18975957), (3, 6325319), (7, 2710851), (11, 1725087), (13, 1459689), (21, 903617), (33, 575029), (39, 486563), (71, 267267), (77, 246441), (89, 213213), (91, 208527), (143, 132699), (213, 89089), (231, 82147), (267, 71071), (273, 69509), (429, 44233), (497, 38181), (623, 30459), (781, 24297), (923, 20559), (979, 19383), (1001, 18957), (1157, 16401), (1491, 12727), (1869, 10153), (2343, 8099), (2769, 6853), (2937, 6461), (3003, 6319), (3471, 5467)]