28721035

素因数分解:

$5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{103}}^1\times {\mathrm{257}}^1$

素因数の和:403

約数の個数: 32

約数和(自身を含む): 41213952

約数和(自身を除く): 12492917

約数列:

[1, 5, 7, 31, 35, 103, 155, 217, 257, 515, 721, 1085, 1285, 1799, 3193, 3605, 7967, 8995, 15965, 22351, 26471, 39835, 55769, 111755, 132355, 185297, 278845, 820601, 926485, 4103005, 5744207, 28721035]

約数ペア:

[(1, 28721035), (5, 5744207), (7, 4103005), (31, 926485), (35, 820601), (103, 278845), (155, 185297), (217, 132355), (257, 111755), (515, 55769), (721, 39835), (1085, 26471), (1285, 22351), (1799, 15965), (3193, 8995), (3605, 7967)]