21757808

素因数分解:

$2^4\times {\mathrm{71}}^1\times {\mathrm{107}}^1\times {\mathrm{179}}^1$

素因数の和:365

約数の個数: 40

約数和(自身を含む): 43390080

約数和(自身を除く): 21632272

約数列:

[1, 2, 4, 8, 16, 71, 107, 142, 179, 214, 284, 358, 428, 568, 716, 856, 1136, 1432, 1712, 2864, 7597, 12709, 15194, 19153, 25418, 30388, 38306, 50836, 60776, 76612, 101672, 121552, 153224, 203344, 306448, 1359863, 2719726, 5439452, 10878904, 21757808]

約数ペア:

[(1, 21757808), (2, 10878904), (4, 5439452), (8, 2719726), (16, 1359863), (71, 306448), (107, 203344), (142, 153224), (179, 121552), (214, 101672), (284, 76612), (358, 60776), (428, 50836), (568, 38306), (716, 30388), (856, 25418), (1136, 19153), (1432, 15194), (1712, 12709), (2864, 7597)]