21318425

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{103}}^1\times {\mathrm{487}}^1$

素因数の和:617

約数の個数: 24

約数和(自身を含む): 28319616

約数和(自身を除く): 7001191

約数列:

[1, 5, 17, 25, 85, 103, 425, 487, 515, 1751, 2435, 2575, 8279, 8755, 12175, 41395, 43775, 50161, 206975, 250805, 852737, 1254025, 4263685, 21318425]

約数ペア:

[(1, 21318425), (5, 4263685), (17, 1254025), (25, 852737), (85, 250805), (103, 206975), (425, 50161), (487, 43775), (515, 41395), (1751, 12175), (2435, 8755), (2575, 8279)]