21357369

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{173}}^1$

素因数の和:262

約数の個数: 48

約数和(自身を含む): 35830080

約数和(自身を除く): 14472711

約数列:

[1, 3, 9, 11, 29, 33, 43, 87, 99, 129, 173, 261, 319, 387, 473, 519, 957, 1247, 1419, 1557, 1903, 2871, 3741, 4257, 5017, 5709, 7439, 11223, 13717, 15051, 17127, 22317, 41151, 45153, 55187, 66951, 81829, 123453, 165561, 215731, 245487, 496683, 647193, 736461, 1941579, 2373041, 7119123, 21357369]

約数ペア:

[(1, 21357369), (3, 7119123), (9, 2373041), (11, 1941579), (29, 736461), (33, 647193), (43, 496683), (87, 245487), (99, 215731), (129, 165561), (173, 123453), (261, 81829), (319, 66951), (387, 55187), (473, 45153), (519, 41151), (957, 22317), (1247, 17127), (1419, 15051), (1557, 13717), (1903, 11223), (2871, 7439), (3741, 5709), (4257, 5017)]