18938871

素因数分解:

$3^2\times 7^1\times {\mathrm{521}}^1\times {\mathrm{577}}^1$

素因数の和:1111

約数の個数: 24

約数和(自身を含む): 31378464

約数和(自身を除く): 12439593

約数列:

[1, 3, 7, 9, 21, 63, 521, 577, 1563, 1731, 3647, 4039, 4689, 5193, 10941, 12117, 32823, 36351, 300617, 901851, 2104319, 2705553, 6312957, 18938871]

約数ペア:

[(1, 18938871), (3, 6312957), (7, 2705553), (9, 2104319), (21, 901851), (63, 300617), (521, 36351), (577, 32823), (1563, 12117), (1731, 10941), (3647, 5193), (4039, 4689)]