21145852

素因数分解:

$2^2\times 7^2\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{193}}^1$

素因数の和:267

約数の個数: 72

約数和(自身を含む): 47682096

約数和(自身を除く): 26536244

約数列:

[1, 2, 4, 7, 13, 14, 26, 28, 43, 49, 52, 86, 91, 98, 172, 182, 193, 196, 301, 364, 386, 559, 602, 637, 772, 1118, 1204, 1274, 1351, 2107, 2236, 2509, 2548, 2702, 3913, 4214, 5018, 5404, 7826, 8299, 8428, 9457, 10036, 15652, 16598, 17563, 18914, 27391, 33196, 35126, 37828, 54782, 58093, 70252, 107887, 109564, 116186, 122941, 215774, 232372, 245882, 406651, 431548, 491764, 755209, 813302, 1510418, 1626604, 3020836, 5286463, 10572926, 21145852]

約数ペア:

[(1, 21145852), (2, 10572926), (4, 5286463), (7, 3020836), (13, 1626604), (14, 1510418), (26, 813302), (28, 755209), (43, 491764), (49, 431548), (52, 406651), (86, 245882), (91, 232372), (98, 215774), (172, 122941), (182, 116186), (193, 109564), (196, 107887), (301, 70252), (364, 58093), (386, 54782), (559, 37828), (602, 35126), (637, 33196), (772, 27391), (1118, 18914), (1204, 17563), (1274, 16598), (1351, 15652), (2107, 10036), (2236, 9457), (2509, 8428), (2548, 8299), (2702, 7826), (3913, 5404), (4214, 5018)]