21980475

素因数分解:

$3^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{83}}^1\times {\mathrm{107}}^1$

素因数の和:217

約数の個数: 72

約数和(自身を含む): 43872192

約数和(自身を除く): 21891717

約数列:

[1, 3, 5, 9, 11, 15, 25, 33, 45, 55, 75, 83, 99, 107, 165, 225, 249, 275, 321, 415, 495, 535, 747, 825, 913, 963, 1177, 1245, 1605, 2075, 2475, 2675, 2739, 3531, 3735, 4565, 4815, 5885, 6225, 8025, 8217, 8881, 10593, 13695, 17655, 18675, 22825, 24075, 26643, 29425, 41085, 44405, 52965, 68475, 79929, 88275, 97691, 133215, 205425, 222025, 264825, 293073, 399645, 488455, 666075, 879219, 1465365, 1998225, 2442275, 4396095, 7326825, 21980475]

約数ペア:

[(1, 21980475), (3, 7326825), (5, 4396095), (9, 2442275), (11, 1998225), (15, 1465365), (25, 879219), (33, 666075), (45, 488455), (55, 399645), (75, 293073), (83, 264825), (99, 222025), (107, 205425), (165, 133215), (225, 97691), (249, 88275), (275, 79929), (321, 68475), (415, 52965), (495, 44405), (535, 41085), (747, 29425), (825, 26643), (913, 24075), (963, 22825), (1177, 18675), (1245, 17655), (1605, 13695), (2075, 10593), (2475, 8881), (2675, 8217), (2739, 8025), (3531, 6225), (3735, 5885), (4565, 4815)]