257432823

素因数分解:

$3^4\times {\mathrm{173}}^1\times {\mathrm{18371}}^1$

素因数の和:18556

約数の個数: 20

約数和(自身を含む): 386804088

約数和(自身を除く): 129371265

約数列:

[1, 3, 9, 27, 81, 173, 519, 1557, 4671, 14013, 18371, 55113, 165339, 496017, 1488051, 3178183, 9534549, 28603647, 85810941, 257432823]

約数ペア:

[(1, 257432823), (3, 85810941), (9, 28603647), (27, 9534549), (81, 3178183), (173, 1488051), (519, 496017), (1557, 165339), (4671, 55113), (14013, 18371)]