20051745

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{19}}^2\times {\mathrm{23}}^2$

素因数の和:99

約数の個数: 72

約数和(自身を含む): 40453056

約数和(自身を除く): 20401311

約数列:

[1, 3, 5, 7, 15, 19, 21, 23, 35, 57, 69, 95, 105, 115, 133, 161, 285, 345, 361, 399, 437, 483, 529, 665, 805, 1083, 1311, 1587, 1805, 1995, 2185, 2415, 2527, 2645, 3059, 3703, 5415, 6555, 7581, 7935, 8303, 9177, 10051, 11109, 12635, 15295, 18515, 24909, 30153, 37905, 41515, 45885, 50255, 55545, 58121, 70357, 124545, 150765, 174363, 190969, 211071, 290605, 351785, 572907, 871815, 954845, 1055355, 1336783, 2864535, 4010349, 6683915, 20051745]

約数ペア:

[(1, 20051745), (3, 6683915), (5, 4010349), (7, 2864535), (15, 1336783), (19, 1055355), (21, 954845), (23, 871815), (35, 572907), (57, 351785), (69, 290605), (95, 211071), (105, 190969), (115, 174363), (133, 150765), (161, 124545), (285, 70357), (345, 58121), (361, 55545), (399, 50255), (437, 45885), (483, 41515), (529, 37905), (665, 30153), (805, 24909), (1083, 18515), (1311, 15295), (1587, 12635), (1805, 11109), (1995, 10051), (2185, 9177), (2415, 8303), (2527, 7935), (2645, 7581), (3059, 6555), (3703, 5415)]