21690136

素因数分解:

$2^3\times {\mathrm{13}}^2\times {\mathrm{61}}^1\times {\mathrm{263}}^1$

素因数の和:356

約数の個数: 48

約数和(自身を含む): 44930160

約数和(自身を除く): 23240024

約数列:

[1, 2, 4, 8, 13, 26, 52, 61, 104, 122, 169, 244, 263, 338, 488, 526, 676, 793, 1052, 1352, 1586, 2104, 3172, 3419, 6344, 6838, 10309, 13676, 16043, 20618, 27352, 32086, 41236, 44447, 64172, 82472, 88894, 128344, 177788, 208559, 355576, 417118, 834236, 1668472, 2711267, 5422534, 10845068, 21690136]

約数ペア:

[(1, 21690136), (2, 10845068), (4, 5422534), (8, 2711267), (13, 1668472), (26, 834236), (52, 417118), (61, 355576), (104, 208559), (122, 177788), (169, 128344), (244, 88894), (263, 82472), (338, 64172), (488, 44447), (526, 41236), (676, 32086), (793, 27352), (1052, 20618), (1352, 16043), (1586, 13676), (2104, 10309), (3172, 6838), (3419, 6344)]