19908680

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{45247}}^1$

素因数の和:45269

約数の個数: 32

約数和(自身を含む): 48867840

約数和(自身を除く): 28959160

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 45247, 90494, 180988, 226235, 361976, 452470, 497717, 904940, 995434, 1809880, 1990868, 2488585, 3981736, 4977170, 9954340, 19908680]

約数ペア:

[(1, 19908680), (2, 9954340), (4, 4977170), (5, 3981736), (8, 2488585), (10, 1990868), (11, 1809880), (20, 995434), (22, 904940), (40, 497717), (44, 452470), (55, 361976), (88, 226235), (110, 180988), (220, 90494), (440, 45247)]