28080003

素因数分解:

$3^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{71}}^1\times {\mathrm{509}}^1$

素因数の和:627

約数の個数: 32

約数和(自身を含む): 44651520

約数和(自身を除く): 16571517

約数列:

[1, 3, 7, 21, 37, 71, 111, 213, 259, 497, 509, 777, 1491, 1527, 2627, 3563, 7881, 10689, 18389, 18833, 36139, 55167, 56499, 108417, 131831, 252973, 395493, 758919, 1337143, 4011429, 9360001, 28080003]

約数ペア:

[(1, 28080003), (3, 9360001), (7, 4011429), (21, 1337143), (37, 758919), (71, 395493), (111, 252973), (213, 131831), (259, 108417), (497, 56499), (509, 55167), (777, 36139), (1491, 18833), (1527, 18389), (2627, 10689), (3563, 7881)]