20779521

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^2\times {\mathrm{2741}}^1$

素因数の和:2789

約数の個数: 24

約数和(自身を含む): 33430464

約数和(自身を除く): 12650943

約数列:

[1, 3, 7, 19, 21, 57, 133, 361, 399, 1083, 2527, 2741, 7581, 8223, 19187, 52079, 57561, 156237, 364553, 989501, 1093659, 2968503, 6926507, 20779521]

約数ペア:

[(1, 20779521), (3, 6926507), (7, 2968503), (19, 1093659), (21, 989501), (57, 364553), (133, 156237), (361, 57561), (399, 52079), (1083, 19187), (2527, 8223), (2741, 7581)]