21189225

素因数分解:

$3^1\times 5^2\times {\mathrm{17}}^1\times {\mathrm{16619}}^1$

素因数の和:16649

約数の個数: 24

約数和(自身を含む): 37095840

約数和(自身を除く): 15906615

約数列:

[1, 3, 5, 15, 17, 25, 51, 75, 85, 255, 425, 1275, 16619, 49857, 83095, 249285, 282523, 415475, 847569, 1246425, 1412615, 4237845, 7063075, 21189225]

約数ペア:

[(1, 21189225), (3, 7063075), (5, 4237845), (15, 1412615), (17, 1246425), (25, 847569), (51, 415475), (75, 282523), (85, 249285), (255, 83095), (425, 49857), (1275, 16619)]