21192908

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{43787}}^1$

素因数の和:43813

約数の個数: 18

約数和(自身を含む): 40766628

約数和(自身を除く): 19573720

約数列:

[1, 2, 4, 11, 22, 44, 121, 242, 484, 43787, 87574, 175148, 481657, 963314, 1926628, 5298227, 10596454, 21192908]

約数ペア:

[(1, 21192908), (2, 10596454), (4, 5298227), (11, 1926628), (22, 963314), (44, 481657), (121, 175148), (242, 87574), (484, 43787)]