21849905

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{103}}^1$

素因数の和:174

約数の個数: 64

約数和(自身を含む): 35942400

約数和(自身を除く): 14092495

約数列:

[1, 5, 7, 11, 19, 29, 35, 55, 77, 95, 103, 133, 145, 203, 209, 319, 385, 515, 551, 665, 721, 1015, 1045, 1133, 1463, 1595, 1957, 2233, 2755, 2987, 3605, 3857, 5665, 6061, 7315, 7931, 9785, 11165, 13699, 14935, 19285, 20909, 21527, 30305, 32857, 39655, 42427, 56753, 68495, 104545, 107635, 150689, 164285, 212135, 229999, 283765, 397271, 624283, 753445, 1149995, 1986355, 3121415, 4369981, 21849905]

約数ペア:

[(1, 21849905), (5, 4369981), (7, 3121415), (11, 1986355), (19, 1149995), (29, 753445), (35, 624283), (55, 397271), (77, 283765), (95, 229999), (103, 212135), (133, 164285), (145, 150689), (203, 107635), (209, 104545), (319, 68495), (385, 56753), (515, 42427), (551, 39655), (665, 32857), (721, 30305), (1015, 21527), (1045, 20909), (1133, 19285), (1463, 14935), (1595, 13699), (1957, 11165), (2233, 9785), (2755, 7931), (2987, 7315), (3605, 6061), (3857, 5665)]