21468909

素因数分解:

$3^1\times 7^2\times {\mathrm{11}}^2\times {\mathrm{17}}^1\times {\mathrm{71}}^1$

素因数の和:127

約数の個数: 72

約数和(自身を含む): 39299904

約数和(自身を除く): 17830995

約数列:

[1, 3, 7, 11, 17, 21, 33, 49, 51, 71, 77, 119, 121, 147, 187, 213, 231, 357, 363, 497, 539, 561, 781, 833, 847, 1207, 1309, 1491, 1617, 2057, 2343, 2499, 2541, 3479, 3621, 3927, 5467, 5929, 6171, 8449, 8591, 9163, 10437, 13277, 14399, 16401, 17787, 25347, 25773, 27489, 38269, 39831, 43197, 59143, 60137, 92939, 100793, 114807, 146047, 177429, 180411, 278817, 302379, 420959, 438141, 650573, 1022329, 1262877, 1951719, 3066987, 7156303, 21468909]

約数ペア:

[(1, 21468909), (3, 7156303), (7, 3066987), (11, 1951719), (17, 1262877), (21, 1022329), (33, 650573), (49, 438141), (51, 420959), (71, 302379), (77, 278817), (119, 180411), (121, 177429), (147, 146047), (187, 114807), (213, 100793), (231, 92939), (357, 60137), (363, 59143), (497, 43197), (539, 39831), (561, 38269), (781, 27489), (833, 25773), (847, 25347), (1207, 17787), (1309, 16401), (1491, 14399), (1617, 13277), (2057, 10437), (2343, 9163), (2499, 8591), (2541, 8449), (3479, 6171), (3621, 5929), (3927, 5467)]