638403591

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^2\times {\mathrm{84211}}^1$

素因数の和:84259

約数の個数: 24

約数和(自身を含む): 1026712704

約数和(自身を除く): 388309113

約数列:

[1, 3, 7, 19, 21, 57, 133, 361, 399, 1083, 2527, 7581, 84211, 252633, 589477, 1600009, 1768431, 4800027, 11200063, 30400171, 33600189, 91200513, 212801197, 638403591]

約数ペア:

[(1, 638403591), (3, 212801197), (7, 91200513), (19, 33600189), (21, 30400171), (57, 11200063), (133, 4800027), (361, 1768431), (399, 1600009), (1083, 589477), (2527, 252633), (7581, 84211)]