28140590

素因数分解:

$2^1\times 5^1\times {\mathrm{79}}^1\times {\mathrm{179}}^1\times {\mathrm{199}}^1$

素因数の和:464

約数の個数: 32

約数和(自身を含む): 51840000

約数和(自身を除く): 23699410

約数列:

[1, 2, 5, 10, 79, 158, 179, 199, 358, 395, 398, 790, 895, 995, 1790, 1990, 14141, 15721, 28282, 31442, 35621, 70705, 71242, 78605, 141410, 157210, 178105, 356210, 2814059, 5628118, 14070295, 28140590]

約数ペア:

[(1, 28140590), (2, 14070295), (5, 5628118), (10, 2814059), (79, 356210), (158, 178105), (179, 157210), (199, 141410), (358, 78605), (395, 71242), (398, 70705), (790, 35621), (895, 31442), (995, 28282), (1790, 15721), (1990, 14141)]