21564225

素因数分解:

$3^4\times 5^2\times {\mathrm{23}}^1\times {\mathrm{463}}^1$

素因数の和:508

約数の個数: 60

約数和(自身を含む): 41771136

約数和(自身を除く): 20206911

約数列:

[1, 3, 5, 9, 15, 23, 25, 27, 45, 69, 75, 81, 115, 135, 207, 225, 345, 405, 463, 575, 621, 675, 1035, 1389, 1725, 1863, 2025, 2315, 3105, 4167, 5175, 6945, 9315, 10649, 11575, 12501, 15525, 20835, 31947, 34725, 37503, 46575, 53245, 62505, 95841, 104175, 159735, 187515, 266225, 287523, 312525, 479205, 798675, 862569, 937575, 1437615, 2396025, 4312845, 7188075, 21564225]

約数ペア:

[(1, 21564225), (3, 7188075), (5, 4312845), (9, 2396025), (15, 1437615), (23, 937575), (25, 862569), (27, 798675), (45, 479205), (69, 312525), (75, 287523), (81, 266225), (115, 187515), (135, 159735), (207, 104175), (225, 95841), (345, 62505), (405, 53245), (463, 46575), (575, 37503), (621, 34725), (675, 31947), (1035, 20835), (1389, 15525), (1725, 12501), (1863, 11575), (2025, 10649), (2315, 9315), (3105, 6945), (4167, 5175)]