28191231

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{4021}}^1$

素因数の和:4087

約数の個数: 24

約数和(自身を含む): 43920240

約数和(自身を除く): 15729009

約数列:

[1, 3, 9, 19, 41, 57, 123, 171, 369, 779, 2337, 4021, 7011, 12063, 36189, 76399, 164861, 229197, 494583, 687591, 1483749, 3132359, 9397077, 28191231]

約数ペア:

[(1, 28191231), (3, 9397077), (9, 3132359), (19, 1483749), (41, 687591), (57, 494583), (123, 229197), (171, 164861), (369, 76399), (779, 36189), (2337, 12063), (4021, 7011)]