21147741

素因数分解:

$3^2\times {\mathrm{19}}^2\times {\mathrm{23}}^1\times {\mathrm{283}}^1$

素因数の和:350

約数の個数: 36

約数和(自身を含む): 33759648

約数和(自身を除く): 12611907

約数列:

[1, 3, 9, 19, 23, 57, 69, 171, 207, 283, 361, 437, 849, 1083, 1311, 2547, 3249, 3933, 5377, 6509, 8303, 16131, 19527, 24909, 48393, 58581, 74727, 102163, 123671, 306489, 371013, 919467, 1113039, 2349749, 7049247, 21147741]

約数ペア:

[(1, 21147741), (3, 7049247), (9, 2349749), (19, 1113039), (23, 919467), (57, 371013), (69, 306489), (171, 123671), (207, 102163), (283, 74727), (361, 58581), (437, 48393), (849, 24909), (1083, 19527), (1311, 16131), (2547, 8303), (3249, 6509), (3933, 5377)]