21291225

素因数分解:

$3^1\times 5^2\times {\mathrm{17}}^1\times {\mathrm{16699}}^1$

素因数の和:16729

約数の個数: 24

約数和(自身を含む): 37274400

約数和(自身を除く): 15983175

約数列:

[1, 3, 5, 15, 17, 25, 51, 75, 85, 255, 425, 1275, 16699, 50097, 83495, 250485, 283883, 417475, 851649, 1252425, 1419415, 4258245, 7097075, 21291225]

約数ペア:

[(1, 21291225), (3, 7097075), (5, 4258245), (15, 1419415), (17, 1252425), (25, 851649), (51, 417475), (75, 283883), (85, 250485), (255, 83495), (425, 50097), (1275, 16699)]