21879775

素因数分解:

$5^2\times {\mathrm{29}}^1\times {\mathrm{103}}^1\times {\mathrm{293}}^1$

素因数の和:435

約数の個数: 24

約数和(自身を含む): 28435680

約数和(自身を除く): 6555905

約数列:

[1, 5, 25, 29, 103, 145, 293, 515, 725, 1465, 2575, 2987, 7325, 8497, 14935, 30179, 42485, 74675, 150895, 212425, 754475, 875191, 4375955, 21879775]

約数ペア:

[(1, 21879775), (5, 4375955), (25, 875191), (29, 754475), (103, 212425), (145, 150895), (293, 74675), (515, 42485), (725, 30179), (1465, 14935), (2575, 8497), (2987, 7325)]