19979531

素因数分解:

${\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{4507}}^1$

素因数の和:4562

約数の個数: 16

約数和(自身を含む): 24235008

約数和(自身を除く): 4255477

約数列:

[1, 11, 13, 31, 143, 341, 403, 4433, 4507, 49577, 58591, 139717, 644501, 1536887, 1816321, 19979531]

約数ペア:

[(1, 19979531), (11, 1816321), (13, 1536887), (31, 644501), (143, 139717), (341, 58591), (403, 49577), (4433, 4507)]