21982401

素因数分解:

$3^3\times 7^1\times {\mathrm{107}}^1\times {\mathrm{1087}}^1$

素因数の和:1210

約数の個数: 32

約数和(自身を含む): 37601280

約数和(自身を除く): 15618879

約数列:

[1, 3, 7, 9, 21, 27, 63, 107, 189, 321, 749, 963, 1087, 2247, 2889, 3261, 6741, 7609, 9783, 20223, 22827, 29349, 68481, 116309, 205443, 348927, 814163, 1046781, 2442489, 3140343, 7327467, 21982401]

約数ペア:

[(1, 21982401), (3, 7327467), (7, 3140343), (9, 2442489), (21, 1046781), (27, 814163), (63, 348927), (107, 205443), (189, 116309), (321, 68481), (749, 29349), (963, 22827), (1087, 20223), (2247, 9783), (2889, 7609), (3261, 6741)]