20297871

素因数分解:

$3^4\times {\mathrm{11}}^2\times {\mathrm{19}}^1\times {\mathrm{109}}^1$

素因数の和:162

約数の個数: 60

約数和(自身を含む): 35404600

約数和(自身を除く): 15106729

約数列:

[1, 3, 9, 11, 19, 27, 33, 57, 81, 99, 109, 121, 171, 209, 297, 327, 363, 513, 627, 891, 981, 1089, 1199, 1539, 1881, 2071, 2299, 2943, 3267, 3597, 5643, 6213, 6897, 8829, 9801, 10791, 13189, 16929, 18639, 20691, 22781, 32373, 39567, 55917, 62073, 68343, 97119, 118701, 167751, 186219, 205029, 250591, 356103, 615087, 751773, 1068309, 1845261, 2255319, 6765957, 20297871]

約数ペア:

[(1, 20297871), (3, 6765957), (9, 2255319), (11, 1845261), (19, 1068309), (27, 751773), (33, 615087), (57, 356103), (81, 250591), (99, 205029), (109, 186219), (121, 167751), (171, 118701), (209, 97119), (297, 68343), (327, 62073), (363, 55917), (513, 39567), (627, 32373), (891, 22781), (981, 20691), (1089, 18639), (1199, 16929), (1539, 13189), (1881, 10791), (2071, 9801), (2299, 8829), (2943, 6897), (3267, 6213), (3597, 5643)]