19979284

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{97}}^1\times {\mathrm{233}}^1$

素因数の和:364

約数の個数: 48

約数和(自身を含む): 40452048

約数和(自身を除く): 20472764

約数列:

[1, 2, 4, 13, 17, 26, 34, 52, 68, 97, 194, 221, 233, 388, 442, 466, 884, 932, 1261, 1649, 2522, 3029, 3298, 3961, 5044, 6058, 6596, 7922, 12116, 15844, 21437, 22601, 42874, 45202, 51493, 85748, 90404, 102986, 205972, 293813, 384217, 587626, 768434, 1175252, 1536868, 4994821, 9989642, 19979284]

約数ペア:

[(1, 19979284), (2, 9989642), (4, 4994821), (13, 1536868), (17, 1175252), (26, 768434), (34, 587626), (52, 384217), (68, 293813), (97, 205972), (194, 102986), (221, 90404), (233, 85748), (388, 51493), (442, 45202), (466, 42874), (884, 22601), (932, 21437), (1261, 15844), (1649, 12116), (2522, 7922), (3029, 6596), (3298, 6058), (3961, 5044)]