18420775

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{89}}^1\times {\mathrm{487}}^1$

素因数の和:603

約数の個数: 24

約数和(自身を含む): 24507360

約数和(自身を除く): 6086585

約数列:

[1, 5, 17, 25, 85, 89, 425, 445, 487, 1513, 2225, 2435, 7565, 8279, 12175, 37825, 41395, 43343, 206975, 216715, 736831, 1083575, 3684155, 18420775]

約数ペア:

[(1, 18420775), (5, 3684155), (17, 1083575), (25, 736831), (85, 216715), (89, 206975), (425, 43343), (445, 41395), (487, 37825), (1513, 12175), (2225, 8279), (2435, 7565)]