21159999

素因数分解:

$3^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{73}}^1\times {\mathrm{107}}^1$

素因数の和:236

約数の個数: 48

約数和(自身を含む): 36571392

約数和(自身を除く): 15411393

約数列:

[1, 3, 7, 9, 21, 43, 63, 73, 107, 129, 219, 301, 321, 387, 511, 657, 749, 903, 963, 1533, 2247, 2709, 3139, 4599, 4601, 6741, 7811, 9417, 13803, 21973, 23433, 28251, 32207, 41409, 54677, 65919, 70299, 96621, 164031, 197757, 289863, 335873, 492093, 1007619, 2351111, 3022857, 7053333, 21159999]

約数ペア:

[(1, 21159999), (3, 7053333), (7, 3022857), (9, 2351111), (21, 1007619), (43, 492093), (63, 335873), (73, 289863), (107, 197757), (129, 164031), (219, 96621), (301, 70299), (321, 65919), (387, 54677), (511, 41409), (657, 32207), (749, 28251), (903, 23433), (963, 21973), (1533, 13803), (2247, 9417), (2709, 7811), (3139, 6741), (4599, 4601)]