28216725

素因数分解:

$3^1\times 5^2\times {\mathrm{439}}^1\times {\mathrm{857}}^1$

素因数の和:1309

約数の個数: 24

約数和(自身を含む): 46812480

約数和(自身を除く): 18595755

約数列:

[1, 3, 5, 15, 25, 75, 439, 857, 1317, 2195, 2571, 4285, 6585, 10975, 12855, 21425, 32925, 64275, 376223, 1128669, 1881115, 5643345, 9405575, 28216725]

約数ペア:

[(1, 28216725), (3, 9405575), (5, 5643345), (15, 1881115), (25, 1128669), (75, 376223), (439, 64275), (857, 32925), (1317, 21425), (2195, 12855), (2571, 10975), (4285, 6585)]