20809275

素因数分解:

$3^1\times 5^2\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{859}}^1$

素因数の和:908

約数の個数: 48

約数和(自身を含む): 38390400

約数和(自身を除く): 17581125

約数列:

[1, 3, 5, 15, 17, 19, 25, 51, 57, 75, 85, 95, 255, 285, 323, 425, 475, 859, 969, 1275, 1425, 1615, 2577, 4295, 4845, 8075, 12885, 14603, 16321, 21475, 24225, 43809, 48963, 64425, 73015, 81605, 219045, 244815, 277457, 365075, 408025, 832371, 1095225, 1224075, 1387285, 4161855, 6936425, 20809275]

約数ペア:

[(1, 20809275), (3, 6936425), (5, 4161855), (15, 1387285), (17, 1224075), (19, 1095225), (25, 832371), (51, 408025), (57, 365075), (75, 277457), (85, 244815), (95, 219045), (255, 81605), (285, 73015), (323, 64425), (425, 48963), (475, 43809), (859, 24225), (969, 21475), (1275, 16321), (1425, 14603), (1615, 12885), (2577, 8075), (4295, 4845)]