20408925

素因数分解:

$3^1\times 5^2\times {\mathrm{17}}^1\times {\mathrm{16007}}^1$

素因数の和:16037

約数の個数: 24

約数和(自身を含む): 35729856

約数和(自身を除く): 15320931

約数列:

[1, 3, 5, 15, 17, 25, 51, 75, 85, 255, 425, 1275, 16007, 48021, 80035, 240105, 272119, 400175, 816357, 1200525, 1360595, 4081785, 6802975, 20408925]

約数ペア:

[(1, 20408925), (3, 6802975), (5, 4081785), (15, 1360595), (17, 1200525), (25, 816357), (51, 400175), (75, 272119), (85, 240105), (255, 80035), (425, 48021), (1275, 16007)]