21241880

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{2099}}^1$

素因数の和:2144

約数の個数: 64

約数和(自身を含む): 54432000

約数和(自身を除く): 33190120

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 23, 40, 44, 46, 55, 88, 92, 110, 115, 184, 220, 230, 253, 440, 460, 506, 920, 1012, 1265, 2024, 2099, 2530, 4198, 5060, 8396, 10120, 10495, 16792, 20990, 23089, 41980, 46178, 48277, 83960, 92356, 96554, 115445, 184712, 193108, 230890, 241385, 386216, 461780, 482770, 531047, 923560, 965540, 1062094, 1931080, 2124188, 2655235, 4248376, 5310470, 10620940, 21241880]

約数ペア:

[(1, 21241880), (2, 10620940), (4, 5310470), (5, 4248376), (8, 2655235), (10, 2124188), (11, 1931080), (20, 1062094), (22, 965540), (23, 923560), (40, 531047), (44, 482770), (46, 461780), (55, 386216), (88, 241385), (92, 230890), (110, 193108), (115, 184712), (184, 115445), (220, 96554), (230, 92356), (253, 83960), (440, 48277), (460, 46178), (506, 41980), (920, 23089), (1012, 20990), (1265, 16792), (2024, 10495), (2099, 10120), (2530, 8396), (4198, 5060)]