21060675

素因数分解:

$3^3\times 5^2\times {\mathrm{41}}^1\times {\mathrm{761}}^1$

素因数の和:821

約数の個数: 48

約数和(自身を含む): 39684960

約数和(自身を除く): 18624285

約数列:

[1, 3, 5, 9, 15, 25, 27, 41, 45, 75, 123, 135, 205, 225, 369, 615, 675, 761, 1025, 1107, 1845, 2283, 3075, 3805, 5535, 6849, 9225, 11415, 19025, 20547, 27675, 31201, 34245, 57075, 93603, 102735, 156005, 171225, 280809, 468015, 513675, 780025, 842427, 1404045, 2340075, 4212135, 7020225, 21060675]

約数ペア:

[(1, 21060675), (3, 7020225), (5, 4212135), (9, 2340075), (15, 1404045), (25, 842427), (27, 780025), (41, 513675), (45, 468015), (75, 280809), (123, 171225), (135, 156005), (205, 102735), (225, 93603), (369, 57075), (615, 34245), (675, 31201), (761, 27675), (1025, 20547), (1107, 19025), (1845, 11415), (2283, 9225), (3075, 6849), (3805, 5535)]