20521809

素因数分解:

$3^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{9871}}^1$

素因数の和:9898

約数の個数: 32

約数和(自身を含む): 37908480

約数和(自身を除く): 17386671

約数列:

[1, 3, 7, 9, 11, 21, 27, 33, 63, 77, 99, 189, 231, 297, 693, 2079, 9871, 29613, 69097, 88839, 108581, 207291, 266517, 325743, 621873, 760067, 977229, 1865619, 2280201, 2931687, 6840603, 20521809]

約数ペア:

[(1, 20521809), (3, 6840603), (7, 2931687), (9, 2280201), (11, 1865619), (21, 977229), (27, 760067), (33, 621873), (63, 325743), (77, 266517), (99, 207291), (189, 108581), (231, 88839), (297, 69097), (693, 29613), (2079, 9871)]