20315555

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{107}}^1\times {\mathrm{127}}^1$

素因数の和:275

約数の個数: 32

約数和(自身を含む): 27869184

約数和(自身を除く): 7553629

約数列:

[1, 5, 13, 23, 65, 107, 115, 127, 299, 535, 635, 1391, 1495, 1651, 2461, 2921, 6955, 8255, 12305, 13589, 14605, 31993, 37973, 67945, 159965, 176657, 189865, 312547, 883285, 1562735, 4063111, 20315555]

約数ペア:

[(1, 20315555), (5, 4063111), (13, 1562735), (23, 883285), (65, 312547), (107, 189865), (115, 176657), (127, 159965), (299, 67945), (535, 37973), (635, 31993), (1391, 14605), (1495, 13589), (1651, 12305), (2461, 8255), (2921, 6955)]