21178340

素因数分解:

$2^2\times 5^1\times {\mathrm{461}}^1\times {\mathrm{2297}}^1$

素因数の和:2767

約数の個数: 24

約数和(自身を含む): 44590392

約数和(自身を除く): 23412052

約数列:

[1, 2, 4, 5, 10, 20, 461, 922, 1844, 2297, 2305, 4594, 4610, 9188, 9220, 11485, 22970, 45940, 1058917, 2117834, 4235668, 5294585, 10589170, 21178340]

約数ペア:

[(1, 21178340), (2, 10589170), (4, 5294585), (5, 4235668), (10, 2117834), (20, 1058917), (461, 45940), (922, 22970), (1844, 11485), (2297, 9220), (2305, 9188), (4594, 4610)]