21208275

素因数分解:

$3^2\times 5^2\times {\mathrm{11}}^2\times {\mathrm{19}}^1\times {\mathrm{41}}^1$

素因数の和:98

約数の個数: 108

約数和(自身を含む): 45023160

約数和(自身を除く): 23814885

約数列:

[1, 3, 5, 9, 11, 15, 19, 25, 33, 41, 45, 55, 57, 75, 95, 99, 121, 123, 165, 171, 205, 209, 225, 275, 285, 363, 369, 451, 475, 495, 605, 615, 627, 779, 825, 855, 1025, 1045, 1089, 1353, 1425, 1815, 1845, 1881, 2255, 2299, 2337, 2475, 3025, 3075, 3135, 3895, 4059, 4275, 4961, 5225, 5445, 6765, 6897, 7011, 8569, 9075, 9225, 9405, 11275, 11495, 11685, 14883, 15675, 19475, 20295, 20691, 24805, 25707, 27225, 33825, 34485, 35055, 42845, 44649, 47025, 57475, 58425, 74415, 77121, 94259, 101475, 103455, 124025, 128535, 172425, 175275, 214225, 223245, 282777, 372075, 385605, 471295, 517275, 642675, 848331, 1116225, 1413885, 1928025, 2356475, 4241655, 7069425, 21208275]

約数ペア:

[(1, 21208275), (3, 7069425), (5, 4241655), (9, 2356475), (11, 1928025), (15, 1413885), (19, 1116225), (25, 848331), (33, 642675), (41, 517275), (45, 471295), (55, 385605), (57, 372075), (75, 282777), (95, 223245), (99, 214225), (121, 175275), (123, 172425), (165, 128535), (171, 124025), (205, 103455), (209, 101475), (225, 94259), (275, 77121), (285, 74415), (363, 58425), (369, 57475), (451, 47025), (475, 44649), (495, 42845), (605, 35055), (615, 34485), (627, 33825), (779, 27225), (825, 25707), (855, 24805), (1025, 20691), (1045, 20295), (1089, 19475), (1353, 15675), (1425, 14883), (1815, 11685), (1845, 11495), (1881, 11275), (2255, 9405), (2299, 9225), (2337, 9075), (2475, 8569), (3025, 7011), (3075, 6897), (3135, 6765), (3895, 5445), (4059, 5225), (4275, 4961)]