20688625

素因数分解:

$5^3\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{281}}^1$

素因数の和:346

約数の個数: 32

約数和(自身を含む): 28154880

約数和(自身を除く): 7466255

約数列:

[1, 5, 19, 25, 31, 95, 125, 155, 281, 475, 589, 775, 1405, 2375, 2945, 3875, 5339, 7025, 8711, 14725, 26695, 35125, 43555, 73625, 133475, 165509, 217775, 667375, 827545, 1088875, 4137725, 20688625]

約数ペア:

[(1, 20688625), (5, 4137725), (19, 1088875), (25, 827545), (31, 667375), (95, 217775), (125, 165509), (155, 133475), (281, 73625), (475, 43555), (589, 35125), (775, 26695), (1405, 14725), (2375, 8711), (2945, 7025), (3875, 5339)]