21681880

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{49277}}^1$

素因数の和:49299

約数の個数: 32

約数和(自身を含む): 53220240

約数和(自身を除く): 31538360

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 49277, 98554, 197108, 246385, 394216, 492770, 542047, 985540, 1084094, 1971080, 2168188, 2710235, 4336376, 5420470, 10840940, 21681880]

約数ペア:

[(1, 21681880), (2, 10840940), (4, 5420470), (5, 4336376), (8, 2710235), (10, 2168188), (11, 1971080), (20, 1084094), (22, 985540), (40, 542047), (44, 492770), (55, 394216), (88, 246385), (110, 197108), (220, 98554), (440, 49277)]