18787431

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{659}}^1$

素因数の和:735

約数の個数: 32

約数和(自身を含む): 29272320

約数和(自身を除く): 10484889

約数列:

[1, 3, 13, 17, 39, 43, 51, 129, 221, 559, 659, 663, 731, 1677, 1977, 2193, 8567, 9503, 11203, 25701, 28337, 28509, 33609, 85011, 145639, 368381, 436917, 481729, 1105143, 1445187, 6262477, 18787431]

約数ペア:

[(1, 18787431), (3, 6262477), (13, 1445187), (17, 1105143), (39, 481729), (43, 436917), (51, 368381), (129, 145639), (221, 85011), (559, 33609), (659, 28509), (663, 28337), (731, 25701), (1677, 11203), (1977, 9503), (2193, 8567)]