21187185

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{4373}}^1$

素因数の和:4417

約数の個数: 32

約数和(自身を含む): 37791360

約数和(自身を除く): 16604175

約数列:

[1, 3, 5, 15, 17, 19, 51, 57, 85, 95, 255, 285, 323, 969, 1615, 4373, 4845, 13119, 21865, 65595, 74341, 83087, 223023, 249261, 371705, 415435, 1115115, 1246305, 1412479, 4237437, 7062395, 21187185]

約数ペア:

[(1, 21187185), (3, 7062395), (5, 4237437), (15, 1412479), (17, 1246305), (19, 1115115), (51, 415435), (57, 371705), (85, 249261), (95, 223023), (255, 83087), (285, 74341), (323, 65595), (969, 21865), (1615, 13119), (4373, 4845)]