18987865

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{293}}^1\times {\mathrm{997}}^1$

素因数の和:1308

約数の個数: 16

約数和(自身を含む): 24646608

約数和(自身を除く): 5658743

約数列:

[1, 5, 13, 65, 293, 997, 1465, 3809, 4985, 12961, 19045, 64805, 292121, 1460605, 3797573, 18987865]

約数ペア:

[(1, 18987865), (5, 3797573), (13, 1460605), (65, 292121), (293, 64805), (997, 19045), (1465, 12961), (3809, 4985)]