28490725

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{1559}}^1$

素因数の和:1629

約数の個数: 24

約数和(自身を含む): 38301120

約数和(自身を除く): 9810395

約数列:

[1, 5, 17, 25, 43, 85, 215, 425, 731, 1075, 1559, 3655, 7795, 18275, 26503, 38975, 67037, 132515, 335185, 662575, 1139629, 1675925, 5698145, 28490725]

約数ペア:

[(1, 28490725), (5, 5698145), (17, 1675925), (25, 1139629), (43, 662575), (85, 335185), (215, 132515), (425, 67037), (731, 38975), (1075, 26503), (1559, 18275), (3655, 7795)]