20784555

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{199}}^1\times {\mathrm{211}}^1$

素因数の和:432

約数の個数: 48

約数和(自身を含む): 39686400

約数和(自身を除く): 18901845

約数列:

[1, 3, 5, 9, 11, 15, 33, 45, 55, 99, 165, 199, 211, 495, 597, 633, 995, 1055, 1791, 1899, 2189, 2321, 2985, 3165, 6567, 6963, 8955, 9495, 10945, 11605, 19701, 20889, 32835, 34815, 41989, 98505, 104445, 125967, 209945, 377901, 461879, 629835, 1385637, 1889505, 2309395, 4156911, 6928185, 20784555]

約数ペア:

[(1, 20784555), (3, 6928185), (5, 4156911), (9, 2309395), (11, 1889505), (15, 1385637), (33, 629835), (45, 461879), (55, 377901), (99, 209945), (165, 125967), (199, 104445), (211, 98505), (495, 41989), (597, 34815), (633, 32835), (995, 20889), (1055, 19701), (1791, 11605), (1899, 10945), (2189, 9495), (2321, 8955), (2985, 6963), (3165, 6567)]