21335912

素因数分解:

$2^3\times {\mathrm{13}}^2\times {\mathrm{43}}^1\times {\mathrm{367}}^1$

素因数の和:442

約数の個数: 48

約数和(自身を含む): 44447040

約数和(自身を除く): 23111128

約数列:

[1, 2, 4, 8, 13, 26, 43, 52, 86, 104, 169, 172, 338, 344, 367, 559, 676, 734, 1118, 1352, 1468, 2236, 2936, 4472, 4771, 7267, 9542, 14534, 15781, 19084, 29068, 31562, 38168, 58136, 62023, 63124, 124046, 126248, 205153, 248092, 410306, 496184, 820612, 1641224, 2666989, 5333978, 10667956, 21335912]

約数ペア:

[(1, 21335912), (2, 10667956), (4, 5333978), (8, 2666989), (13, 1641224), (26, 820612), (43, 496184), (52, 410306), (86, 248092), (104, 205153), (169, 126248), (172, 124046), (338, 63124), (344, 62023), (367, 58136), (559, 38168), (676, 31562), (734, 29068), (1118, 19084), (1352, 15781), (1468, 14534), (2236, 9542), (2936, 7267), (4472, 4771)]