21047728

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{2153}}^1$

素因数の和:2221

約数の個数: 40

約数和(自身を含む): 44872128

約数和(自身を除く): 23824400

約数列:

[1, 2, 4, 8, 13, 16, 26, 47, 52, 94, 104, 188, 208, 376, 611, 752, 1222, 2153, 2444, 4306, 4888, 8612, 9776, 17224, 27989, 34448, 55978, 101191, 111956, 202382, 223912, 404764, 447824, 809528, 1315483, 1619056, 2630966, 5261932, 10523864, 21047728]

約数ペア:

[(1, 21047728), (2, 10523864), (4, 5261932), (8, 2630966), (13, 1619056), (16, 1315483), (26, 809528), (47, 447824), (52, 404764), (94, 223912), (104, 202382), (188, 111956), (208, 101191), (376, 55978), (611, 34448), (752, 27989), (1222, 17224), (2153, 9776), (2444, 8612), (4306, 4888)]