81216675

素因数分解:

$3^5\times 5^2\times {\mathrm{29}}^1\times {\mathrm{461}}^1$

素因数の和:515

約数の個数: 72

約数和(自身を含む): 156396240

約数和(自身を除く): 75179565

約数列:

[1, 3, 5, 9, 15, 25, 27, 29, 45, 75, 81, 87, 135, 145, 225, 243, 261, 405, 435, 461, 675, 725, 783, 1215, 1305, 1383, 2025, 2175, 2305, 2349, 3915, 4149, 6075, 6525, 6915, 7047, 11525, 11745, 12447, 13369, 19575, 20745, 34575, 35235, 37341, 40107, 58725, 62235, 66845, 103725, 112023, 120321, 176175, 186705, 200535, 311175, 334225, 360963, 560115, 601605, 933525, 1002675, 1082889, 1804815, 2800575, 3008025, 3248667, 5414445, 9024075, 16243335, 27072225, 81216675]

約数ペア:

[(1, 81216675), (3, 27072225), (5, 16243335), (9, 9024075), (15, 5414445), (25, 3248667), (27, 3008025), (29, 2800575), (45, 1804815), (75, 1082889), (81, 1002675), (87, 933525), (135, 601605), (145, 560115), (225, 360963), (243, 334225), (261, 311175), (405, 200535), (435, 186705), (461, 176175), (675, 120321), (725, 112023), (783, 103725), (1215, 66845), (1305, 62235), (1383, 58725), (2025, 40107), (2175, 37341), (2305, 35235), (2349, 34575), (3915, 20745), (4149, 19575), (6075, 13369), (6525, 12447), (6915, 11745), (7047, 11525)]