21709425

素因数分解:

$3^1\times 5^2\times {\mathrm{17}}^1\times {\mathrm{17027}}^1$

素因数の和:17057

約数の個数: 24

約数和(自身を含む): 38006496

約数和(自身を除く): 16297071

約数列:

[1, 3, 5, 15, 17, 25, 51, 75, 85, 255, 425, 1275, 17027, 51081, 85135, 255405, 289459, 425675, 868377, 1277025, 1447295, 4341885, 7236475, 21709425]

約数ペア:

[(1, 21709425), (3, 7236475), (5, 4341885), (15, 1447295), (17, 1277025), (25, 868377), (51, 425675), (75, 289459), (85, 255405), (255, 85135), (425, 51081), (1275, 17027)]