19728555

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1$

素因数の和:105

約数の個数: 128

約数和(自身を含む): 44236800

約数和(自身を除く): 24508245

約数列:

[1, 3, 5, 7, 11, 15, 19, 21, 29, 31, 33, 35, 55, 57, 77, 87, 93, 95, 105, 133, 145, 155, 165, 203, 209, 217, 231, 285, 319, 341, 385, 399, 435, 465, 551, 589, 609, 627, 651, 665, 899, 957, 1015, 1023, 1045, 1085, 1155, 1463, 1595, 1653, 1705, 1767, 1995, 2233, 2387, 2697, 2755, 2945, 3045, 3135, 3255, 3857, 4123, 4389, 4495, 4785, 5115, 6061, 6293, 6479, 6699, 7161, 7315, 8265, 8835, 9889, 11165, 11571, 11935, 12369, 13485, 17081, 18183, 18879, 19285, 19437, 20615, 21945, 29667, 30305, 31465, 32395, 33495, 35805, 42427, 45353, 49445, 51243, 57855, 61845, 69223, 85405, 90915, 94395, 97185, 119567, 127281, 136059, 148335, 187891, 207669, 212135, 226765, 256215, 346115, 358701, 563673, 597835, 636405, 680295, 939455, 1038345, 1315237, 1793505, 2818365, 3945711, 6576185, 19728555]

約数ペア:

[(1, 19728555), (3, 6576185), (5, 3945711), (7, 2818365), (11, 1793505), (15, 1315237), (19, 1038345), (21, 939455), (29, 680295), (31, 636405), (33, 597835), (35, 563673), (55, 358701), (57, 346115), (77, 256215), (87, 226765), (93, 212135), (95, 207669), (105, 187891), (133, 148335), (145, 136059), (155, 127281), (165, 119567), (203, 97185), (209, 94395), (217, 90915), (231, 85405), (285, 69223), (319, 61845), (341, 57855), (385, 51243), (399, 49445), (435, 45353), (465, 42427), (551, 35805), (589, 33495), (609, 32395), (627, 31465), (651, 30305), (665, 29667), (899, 21945), (957, 20615), (1015, 19437), (1023, 19285), (1045, 18879), (1085, 18183), (1155, 17081), (1463, 13485), (1595, 12369), (1653, 11935), (1705, 11571), (1767, 11165), (1995, 9889), (2233, 8835), (2387, 8265), (2697, 7315), (2755, 7161), (2945, 6699), (3045, 6479), (3135, 6293), (3255, 6061), (3857, 5115), (4123, 4785), (4389, 4495)]