28278891

素因数分解:

$3^2\times {\mathrm{23}}^1\times {\mathrm{67}}^1\times {\mathrm{2039}}^1$

素因数の和:2135

約数の個数: 24

約数和(自身を含む): 43280640

約数和(自身を除く): 15001749

約数列:

[1, 3, 9, 23, 67, 69, 201, 207, 603, 1541, 2039, 4623, 6117, 13869, 18351, 46897, 136613, 140691, 409839, 422073, 1229517, 3142099, 9426297, 28278891]

約数ペア:

[(1, 28278891), (3, 9426297), (9, 3142099), (23, 1229517), (67, 422073), (69, 409839), (201, 140691), (207, 136613), (603, 46897), (1541, 18351), (2039, 13869), (4623, 6117)]