20528265

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^2\times {\mathrm{223}}^1$

素因数の和:286

約数の個数: 48

約数和(自身を含む): 36868608

約数和(自身を除く): 16340343

約数列:

[1, 3, 5, 15, 17, 19, 51, 57, 85, 95, 223, 255, 285, 323, 361, 669, 969, 1083, 1115, 1615, 1805, 3345, 3791, 4237, 4845, 5415, 6137, 11373, 12711, 18411, 18955, 21185, 30685, 56865, 63555, 72029, 80503, 92055, 216087, 241509, 360145, 402515, 1080435, 1207545, 1368551, 4105653, 6842755, 20528265]

約数ペア:

[(1, 20528265), (3, 6842755), (5, 4105653), (15, 1368551), (17, 1207545), (19, 1080435), (51, 402515), (57, 360145), (85, 241509), (95, 216087), (223, 92055), (255, 80503), (285, 72029), (323, 63555), (361, 56865), (669, 30685), (969, 21185), (1083, 18955), (1115, 18411), (1615, 12711), (1805, 11373), (3345, 6137), (3791, 5415), (4237, 4845)]