21652305

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{109}}^1$

素因数の和:194

約数の個数: 64

約数和(自身を含む): 39916800

約数和(自身を除く): 18264495

約数列:

[1, 3, 5, 15, 17, 19, 41, 51, 57, 85, 95, 109, 123, 205, 255, 285, 323, 327, 545, 615, 697, 779, 969, 1615, 1635, 1853, 2071, 2091, 2337, 3485, 3895, 4469, 4845, 5559, 6213, 9265, 10355, 10455, 11685, 13243, 13407, 22345, 27795, 31065, 35207, 39729, 66215, 67035, 75973, 84911, 105621, 176035, 198645, 227919, 254733, 379865, 424555, 528105, 1139595, 1273665, 1443487, 4330461, 7217435, 21652305]

約数ペア:

[(1, 21652305), (3, 7217435), (5, 4330461), (15, 1443487), (17, 1273665), (19, 1139595), (41, 528105), (51, 424555), (57, 379865), (85, 254733), (95, 227919), (109, 198645), (123, 176035), (205, 105621), (255, 84911), (285, 75973), (323, 67035), (327, 66215), (545, 39729), (615, 35207), (697, 31065), (779, 27795), (969, 22345), (1615, 13407), (1635, 13243), (1853, 11685), (2071, 10455), (2091, 10355), (2337, 9265), (3485, 6213), (3895, 5559), (4469, 4845)]