21999560

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{49999}}^1$

素因数の和:50021

約数の個数: 32

約数和(自身を含む): 54000000

約数和(自身を除く): 32000440

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 49999, 99998, 199996, 249995, 399992, 499990, 549989, 999980, 1099978, 1999960, 2199956, 2749945, 4399912, 5499890, 10999780, 21999560]

約数ペア:

[(1, 21999560), (2, 10999780), (4, 5499890), (5, 4399912), (8, 2749945), (10, 2199956), (11, 1999960), (20, 1099978), (22, 999980), (40, 549989), (44, 499990), (55, 399992), (88, 249995), (110, 199996), (220, 99998), (440, 49999)]