21556755

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{37}}^1\times {\mathrm{107}}^1$

素因数の和:177

約数の個数: 72

約数和(自身を含む): 42574896

約数和(自身を除く): 21018141

約数列:

[1, 3, 5, 9, 11, 15, 33, 37, 45, 55, 99, 107, 111, 121, 165, 185, 321, 333, 363, 407, 495, 535, 555, 605, 963, 1089, 1177, 1221, 1605, 1665, 1815, 2035, 3531, 3663, 3959, 4477, 4815, 5445, 5885, 6105, 10593, 11877, 12947, 13431, 17655, 18315, 19795, 22385, 35631, 38841, 40293, 43549, 52965, 59385, 64735, 67155, 116523, 130647, 178155, 194205, 201465, 217745, 391941, 479039, 582615, 653235, 1437117, 1959705, 2395195, 4311351, 7185585, 21556755]

約数ペア:

[(1, 21556755), (3, 7185585), (5, 4311351), (9, 2395195), (11, 1959705), (15, 1437117), (33, 653235), (37, 582615), (45, 479039), (55, 391941), (99, 217745), (107, 201465), (111, 194205), (121, 178155), (165, 130647), (185, 116523), (321, 67155), (333, 64735), (363, 59385), (407, 52965), (495, 43549), (535, 40293), (555, 38841), (605, 35631), (963, 22385), (1089, 19795), (1177, 18315), (1221, 17655), (1605, 13431), (1665, 12947), (1815, 11877), (2035, 10593), (3531, 6105), (3663, 5885), (3959, 5445), (4477, 4815)]