21310191

素因数分解:

$3^2\times 7^1\times {\mathrm{19}}^2\times {\mathrm{937}}^1$

素因数の和:988

約数の個数: 36

約数和(自身を含む): 37167312

約数和(自身を除く): 15857121

約数列:

[1, 3, 7, 9, 19, 21, 57, 63, 133, 171, 361, 399, 937, 1083, 1197, 2527, 2811, 3249, 6559, 7581, 8433, 17803, 19677, 22743, 53409, 59031, 124621, 160227, 338257, 373863, 1014771, 1121589, 2367799, 3044313, 7103397, 21310191]

約数ペア:

[(1, 21310191), (3, 7103397), (7, 3044313), (9, 2367799), (19, 1121589), (21, 1014771), (57, 373863), (63, 338257), (133, 160227), (171, 124621), (361, 59031), (399, 53409), (937, 22743), (1083, 19677), (1197, 17803), (2527, 8433), (2811, 7581), (3249, 6559)]