19720778875

素因数分解:

$5^3\times 7^2\times {\mathrm{1009}}^1\times {\mathrm{3191}}^1$

素因数の和:4229

約数の個数: 48

約数和(自身を含む): 28667096640

約数和(自身を除く): 8946317765

約数列:

[1, 5, 7, 25, 35, 49, 125, 175, 245, 875, 1009, 1225, 3191, 5045, 6125, 7063, 15955, 22337, 25225, 35315, 49441, 79775, 111685, 126125, 156359, 176575, 247205, 398875, 558425, 781795, 882875, 1236025, 2792125, 3219719, 3908975, 6180125, 16098595, 19544875, 22538033, 80492975, 112690165, 157766231, 402464875, 563450825, 788831155, 2817254125, 3944155775, 19720778875]

約数ペア:

[(1, 19720778875), (5, 3944155775), (7, 2817254125), (25, 788831155), (35, 563450825), (49, 402464875), (125, 157766231), (175, 112690165), (245, 80492975), (875, 22538033), (1009, 19544875), (1225, 16098595), (3191, 6180125), (5045, 3908975), (6125, 3219719), (7063, 2792125), (15955, 1236025), (22337, 882875), (25225, 781795), (35315, 558425), (49441, 398875), (79775, 247205), (111685, 176575), (126125, 156359)]