18151221

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{71}}^1\times {\mathrm{127}}^1$

素因数の和:273

約数の個数: 32

約数和(自身を含む): 27426816

約数和(自身を除く): 9275595

約数列:

[1, 3, 11, 33, 61, 71, 127, 183, 213, 381, 671, 781, 1397, 2013, 2343, 4191, 4331, 7747, 9017, 12993, 23241, 27051, 47641, 85217, 99187, 142923, 255651, 297561, 550037, 1650111, 6050407, 18151221]

約数ペア:

[(1, 18151221), (3, 6050407), (11, 1650111), (33, 550037), (61, 297561), (71, 255651), (127, 142923), (183, 99187), (213, 85217), (381, 47641), (671, 27051), (781, 23241), (1397, 12993), (2013, 9017), (2343, 7747), (4191, 4331)]