21530781

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{41}}^1\times {\mathrm{83}}^1$

素因数の和:186

約数の個数: 48

約数和(自身を含む): 34856640

約数和(自身を除く): 13325859

約数列:

[1, 3, 9, 19, 37, 41, 57, 83, 111, 123, 171, 249, 333, 369, 703, 747, 779, 1517, 1577, 2109, 2337, 3071, 3403, 4551, 4731, 6327, 7011, 9213, 10209, 13653, 14193, 27639, 28823, 30627, 58349, 64657, 86469, 125911, 175047, 193971, 259407, 377733, 525141, 581913, 1133199, 2392309, 7176927, 21530781]

約数ペア:

[(1, 21530781), (3, 7176927), (9, 2392309), (19, 1133199), (37, 581913), (41, 525141), (57, 377733), (83, 259407), (111, 193971), (123, 175047), (171, 125911), (249, 86469), (333, 64657), (369, 58349), (703, 30627), (747, 28823), (779, 27639), (1517, 14193), (1577, 13653), (2109, 10209), (2337, 9213), (3071, 7011), (3403, 6327), (4551, 4731)]