18387681

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{67}}^1\times {\mathrm{227}}^1$

素因数の和:341

約数の個数: 32

約数和(自身を含む): 27783168

約数和(自身を除く): 9395487

約数列:

[1, 3, 13, 31, 39, 67, 93, 201, 227, 403, 681, 871, 1209, 2077, 2613, 2951, 6231, 7037, 8853, 15209, 21111, 27001, 45627, 81003, 91481, 197717, 274443, 471479, 593151, 1414437, 6129227, 18387681]

約数ペア:

[(1, 18387681), (3, 6129227), (13, 1414437), (31, 593151), (39, 471479), (67, 274443), (93, 197717), (201, 91481), (227, 81003), (403, 45627), (681, 27001), (871, 21111), (1209, 15209), (2077, 8853), (2613, 7037), (2951, 6231)]