20659221

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{211}}^1$

素因数の和:294

約数の個数: 48

約数和(自身を含む): 34924032

約数和(自身を除く): 14264811

約数列:

[1, 3, 9, 11, 23, 33, 43, 69, 99, 129, 207, 211, 253, 387, 473, 633, 759, 989, 1419, 1899, 2277, 2321, 2967, 4257, 4853, 6963, 8901, 9073, 10879, 14559, 20889, 27219, 32637, 43677, 53383, 81657, 97911, 99803, 160149, 208679, 299409, 480447, 626037, 898227, 1878111, 2295469, 6886407, 20659221]

約数ペア:

[(1, 20659221), (3, 6886407), (9, 2295469), (11, 1878111), (23, 898227), (33, 626037), (43, 480447), (69, 299409), (99, 208679), (129, 160149), (207, 99803), (211, 97911), (253, 81657), (387, 53383), (473, 43677), (633, 32637), (759, 27219), (989, 20889), (1419, 14559), (1899, 10879), (2277, 9073), (2321, 8901), (2967, 6963), (4257, 4853)]