21519784

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{13}}^2\times {\mathrm{1447}}^1$

素因数の和:1490

約数の個数: 48

約数和(自身を含む): 47697120

約数和(自身を除く): 26177336

約数列:

[1, 2, 4, 8, 11, 13, 22, 26, 44, 52, 88, 104, 143, 169, 286, 338, 572, 676, 1144, 1352, 1447, 1859, 2894, 3718, 5788, 7436, 11576, 14872, 15917, 18811, 31834, 37622, 63668, 75244, 127336, 150488, 206921, 244543, 413842, 489086, 827684, 978172, 1655368, 1956344, 2689973, 5379946, 10759892, 21519784]

約数ペア:

[(1, 21519784), (2, 10759892), (4, 5379946), (8, 2689973), (11, 1956344), (13, 1655368), (22, 978172), (26, 827684), (44, 489086), (52, 413842), (88, 244543), (104, 206921), (143, 150488), (169, 127336), (286, 75244), (338, 63668), (572, 37622), (676, 31834), (1144, 18811), (1352, 15917), (1447, 14872), (1859, 11576), (2894, 7436), (3718, 5788)]