20641875

素因数分解:

$3^1\times 5^4\times {\mathrm{101}}^1\times {\mathrm{109}}^1$

素因数の和:233

約数の個数: 40

約数和(自身を含む): 35051280

約数和(自身を除く): 14409405

約数列:

[1, 3, 5, 15, 25, 75, 101, 109, 125, 303, 327, 375, 505, 545, 625, 1515, 1635, 1875, 2525, 2725, 7575, 8175, 11009, 12625, 13625, 33027, 37875, 40875, 55045, 63125, 68125, 165135, 189375, 204375, 275225, 825675, 1376125, 4128375, 6880625, 20641875]

約数ペア:

[(1, 20641875), (3, 6880625), (5, 4128375), (15, 1376125), (25, 825675), (75, 275225), (101, 204375), (109, 189375), (125, 165135), (303, 68125), (327, 63125), (375, 55045), (505, 40875), (545, 37875), (625, 33027), (1515, 13625), (1635, 12625), (1875, 11009), (2525, 8175), (2725, 7575)]