19749639

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{991}}^1$

素因数の和:1087

約数の個数: 32

約数和(自身を含む): 32886784

約数和(自身を除く): 13137145

約数列:

[1, 3, 7, 13, 21, 39, 73, 91, 219, 273, 511, 949, 991, 1533, 2847, 2973, 6643, 6937, 12883, 19929, 20811, 38649, 72343, 90181, 217029, 270543, 506401, 940459, 1519203, 2821377, 6583213, 19749639]

約数ペア:

[(1, 19749639), (3, 6583213), (7, 2821377), (13, 1519203), (21, 940459), (39, 506401), (73, 270543), (91, 217029), (219, 90181), (273, 72343), (511, 38649), (949, 20811), (991, 19929), (1533, 12883), (2847, 6937), (2973, 6643)]