19813911

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{79}}^1\times {\mathrm{109}}^1$

素因数の和:263

約数の個数: 32

約数和(自身を含む): 29568000

約数和(自身を除く): 9754089

約数列:

[1, 3, 13, 39, 59, 79, 109, 177, 237, 327, 767, 1027, 1417, 2301, 3081, 4251, 4661, 6431, 8611, 13983, 19293, 25833, 60593, 83603, 111943, 181779, 250809, 335829, 508049, 1524147, 6604637, 19813911]

約数ペア:

[(1, 19813911), (3, 6604637), (13, 1524147), (39, 508049), (59, 335829), (79, 250809), (109, 181779), (177, 111943), (237, 83603), (327, 60593), (767, 25833), (1027, 19293), (1417, 13983), (2301, 8611), (3081, 6431), (4251, 4661)]