28187811

素因数分解:

$3^3\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{2389}}^1$

素因数の和:2440

約数の個数: 32

約数和(自身を含む): 45888000

約数和(自身を除く): 17700189

約数列:

[1, 3, 9, 19, 23, 27, 57, 69, 171, 207, 437, 513, 621, 1311, 2389, 3933, 7167, 11799, 21501, 45391, 54947, 64503, 136173, 164841, 408519, 494523, 1043993, 1225557, 1483569, 3131979, 9395937, 28187811]

約数ペア:

[(1, 28187811), (3, 9395937), (9, 3131979), (19, 1483569), (23, 1225557), (27, 1043993), (57, 494523), (69, 408519), (171, 164841), (207, 136173), (437, 64503), (513, 54947), (621, 45391), (1311, 21501), (2389, 11799), (3933, 7167)]