21285693

素因数分解:

$3^3\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{149}}^1$

素因数の和:219

約数の個数: 64

約数和(自身を含む): 38304000

約数和(自身を除く): 17018307

約数列:

[1, 3, 9, 11, 13, 27, 33, 37, 39, 99, 111, 117, 143, 149, 297, 333, 351, 407, 429, 447, 481, 999, 1221, 1287, 1341, 1443, 1639, 1937, 3663, 3861, 4023, 4329, 4917, 5291, 5513, 5811, 10989, 12987, 14751, 15873, 16539, 17433, 21307, 44253, 47619, 49617, 52299, 60643, 63921, 71669, 142857, 148851, 181929, 191763, 215007, 545787, 575289, 645021, 788359, 1637361, 1935063, 2365077, 7095231, 21285693]

約数ペア:

[(1, 21285693), (3, 7095231), (9, 2365077), (11, 1935063), (13, 1637361), (27, 788359), (33, 645021), (37, 575289), (39, 545787), (99, 215007), (111, 191763), (117, 181929), (143, 148851), (149, 142857), (297, 71669), (333, 63921), (351, 60643), (407, 52299), (429, 49617), (447, 47619), (481, 44253), (999, 21307), (1221, 17433), (1287, 16539), (1341, 15873), (1443, 14751), (1639, 12987), (1937, 10989), (3663, 5811), (3861, 5513), (4023, 5291), (4329, 4917)]