21076263

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{19}}^2\times {\mathrm{499}}^1$

素因数の和:556

約数の個数: 36

約数和(自身を含む): 34671000

約数和(自身を除く): 13594737

約数列:

[1, 3, 9, 13, 19, 39, 57, 117, 171, 247, 361, 499, 741, 1083, 1497, 2223, 3249, 4491, 4693, 6487, 9481, 14079, 19461, 28443, 42237, 58383, 85329, 123253, 180139, 369759, 540417, 1109277, 1621251, 2341807, 7025421, 21076263]

約数ペア:

[(1, 21076263), (3, 7025421), (9, 2341807), (13, 1621251), (19, 1109277), (39, 540417), (57, 369759), (117, 180139), (171, 123253), (247, 85329), (361, 58383), (499, 42237), (741, 28443), (1083, 19461), (1497, 14079), (2223, 9481), (3249, 6487), (4491, 4693)]