21386931

素因数分解:

$3^1\times {\mathrm{31}}^1\times {\mathrm{53}}^1\times {\mathrm{4339}}^1$

素因数の和:4426

約数の個数: 16

約数和(自身を含む): 29998080

約数和(自身を除く): 8611149

約数列:

[1, 3, 31, 53, 93, 159, 1643, 4339, 4929, 13017, 134509, 229967, 403527, 689901, 7128977, 21386931]

約数ペア:

[(1, 21386931), (3, 7128977), (31, 689901), (53, 403527), (93, 229967), (159, 134509), (1643, 13017), (4339, 4929)]