20121387

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{89}}^1$

素因数の和:164

約数の個数: 64

約数和(自身を含む): 34836480

約数和(自身を除く): 14715093

約数列:

[1, 3, 11, 13, 17, 31, 33, 39, 51, 89, 93, 143, 187, 221, 267, 341, 403, 429, 527, 561, 663, 979, 1023, 1157, 1209, 1513, 1581, 2431, 2759, 2937, 3471, 4433, 4539, 5797, 6851, 7293, 8277, 12727, 13299, 16643, 17391, 19669, 20553, 30349, 35867, 38181, 46903, 49929, 59007, 75361, 91047, 107601, 140709, 216359, 226083, 394537, 515933, 609739, 649077, 1183611, 1547799, 1829217, 6707129, 20121387]

約数ペア:

[(1, 20121387), (3, 6707129), (11, 1829217), (13, 1547799), (17, 1183611), (31, 649077), (33, 609739), (39, 515933), (51, 394537), (89, 226083), (93, 216359), (143, 140709), (187, 107601), (221, 91047), (267, 75361), (341, 59007), (403, 49929), (429, 46903), (527, 38181), (561, 35867), (663, 30349), (979, 20553), (1023, 19669), (1157, 17391), (1209, 16643), (1513, 13299), (1581, 12727), (2431, 8277), (2759, 7293), (2937, 6851), (3471, 5797), (4433, 4539)]