256423887

素因数分解:

$3^4\times {\mathrm{29}}^1\times {\mathrm{173}}^1\times {\mathrm{631}}^1$

素因数の和:845

約数の個数: 40

約数和(自身を含む): 399183840

約数和(自身を除く): 142759953

約数列:

[1, 3, 9, 27, 29, 81, 87, 173, 261, 519, 631, 783, 1557, 1893, 2349, 4671, 5017, 5679, 14013, 15051, 17037, 18299, 45153, 51111, 54897, 109163, 135459, 164691, 327489, 406377, 494073, 982467, 1482219, 2947401, 3165727, 8842203, 9497181, 28491543, 85474629, 256423887]

約数ペア:

[(1, 256423887), (3, 85474629), (9, 28491543), (27, 9497181), (29, 8842203), (81, 3165727), (87, 2947401), (173, 1482219), (261, 982467), (519, 494073), (631, 406377), (783, 327489), (1557, 164691), (1893, 135459), (2349, 109163), (4671, 54897), (5017, 51111), (5679, 45153), (14013, 18299), (15051, 17037)]