18980871

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{251}}^1\times {\mathrm{277}}^1$

素因数の和:551

約数の個数: 32

約数和(自身を含む): 31385088

約数和(自身を除く): 12404217

約数列:

[1, 3, 7, 13, 21, 39, 91, 251, 273, 277, 753, 831, 1757, 1939, 3263, 3601, 5271, 5817, 9789, 10803, 22841, 25207, 68523, 69527, 75621, 208581, 486689, 903851, 1460067, 2711553, 6326957, 18980871]

約数ペア:

[(1, 18980871), (3, 6326957), (7, 2711553), (13, 1460067), (21, 903851), (39, 486689), (91, 208581), (251, 75621), (273, 69527), (277, 68523), (753, 25207), (831, 22841), (1757, 10803), (1939, 9789), (3263, 5817), (3601, 5271)]