20021155

素因数分解:

$5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1$

素因数の和:89

約数の個数: 96

約数和(自身を含む): 35458560

約数和(自身を除く): 15437405

約数列:

[1, 5, 7, 11, 17, 19, 23, 35, 49, 55, 77, 85, 95, 115, 119, 133, 161, 187, 209, 245, 253, 323, 385, 391, 437, 539, 595, 665, 805, 833, 931, 935, 1045, 1127, 1265, 1309, 1463, 1615, 1771, 1955, 2185, 2261, 2695, 2737, 3059, 3553, 4165, 4301, 4655, 4807, 5635, 6545, 7315, 7429, 8855, 9163, 10241, 11305, 12397, 13685, 15295, 15827, 17765, 19159, 21413, 21505, 24035, 24871, 30107, 33649, 37145, 45815, 51205, 52003, 61985, 79135, 81719, 95795, 107065, 124355, 150535, 168245, 174097, 210749, 235543, 260015, 364021, 408595, 572033, 870485, 1053745, 1177715, 1820105, 2860165, 4004231, 20021155]

約数ペア:

[(1, 20021155), (5, 4004231), (7, 2860165), (11, 1820105), (17, 1177715), (19, 1053745), (23, 870485), (35, 572033), (49, 408595), (55, 364021), (77, 260015), (85, 235543), (95, 210749), (115, 174097), (119, 168245), (133, 150535), (161, 124355), (187, 107065), (209, 95795), (245, 81719), (253, 79135), (323, 61985), (385, 52003), (391, 51205), (437, 45815), (539, 37145), (595, 33649), (665, 30107), (805, 24871), (833, 24035), (931, 21505), (935, 21413), (1045, 19159), (1127, 17765), (1265, 15827), (1309, 15295), (1463, 13685), (1615, 12397), (1771, 11305), (1955, 10241), (2185, 9163), (2261, 8855), (2695, 7429), (2737, 7315), (3059, 6545), (3553, 5635), (4165, 4807), (4301, 4655)]