21257613

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{853}}^1$

素因数の和:946

約数の個数: 32

約数和(自身を含む): 34433280

約数和(自身を除く): 13175667

約数列:

[1, 3, 9, 13, 27, 39, 71, 117, 213, 351, 639, 853, 923, 1917, 2559, 2769, 7677, 8307, 11089, 23031, 24921, 33267, 60563, 99801, 181689, 299403, 545067, 787319, 1635201, 2361957, 7085871, 21257613]

約数ペア:

[(1, 21257613), (3, 7085871), (9, 2361957), (13, 1635201), (27, 787319), (39, 545067), (71, 299403), (117, 181689), (213, 99801), (351, 60563), (639, 33267), (853, 24921), (923, 23031), (1917, 11089), (2559, 8307), (2769, 7677)]