21378940

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{97177}}^1$

素因数の和:97197

約数の個数: 24

約数和(自身を含む): 48977712

約数和(自身を除く): 27598772

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 97177, 194354, 388708, 485885, 971770, 1068947, 1943540, 2137894, 4275788, 5344735, 10689470, 21378940]

約数ペア:

[(1, 21378940), (2, 10689470), (4, 5344735), (5, 4275788), (10, 2137894), (11, 1943540), (20, 1068947), (22, 971770), (44, 485885), (55, 388708), (110, 194354), (220, 97177)]