20279721

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{23}}^1\times {\mathrm{347}}^1$

素因数の和:402

約数の個数: 48

約数和(自身を含む): 35546112

約数和(自身を除く): 15266391

約数列:

[1, 3, 7, 11, 21, 23, 33, 69, 77, 121, 161, 231, 253, 347, 363, 483, 759, 847, 1041, 1771, 2429, 2541, 2783, 3817, 5313, 7287, 7981, 8349, 11451, 19481, 23943, 26719, 41987, 55867, 58443, 80157, 87791, 125961, 167601, 263373, 293909, 614537, 881727, 965701, 1843611, 2897103, 6759907, 20279721]

約数ペア:

[(1, 20279721), (3, 6759907), (7, 2897103), (11, 1843611), (21, 965701), (23, 881727), (33, 614537), (69, 293909), (77, 263373), (121, 167601), (161, 125961), (231, 87791), (253, 80157), (347, 58443), (363, 55867), (483, 41987), (759, 26719), (847, 23943), (1041, 19481), (1771, 11451), (2429, 8349), (2541, 7981), (2783, 7287), (3817, 5313)]