64821425

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{3547}}^1$

素因数の和:3617

約数の個数: 24

約数和(自身を含む): 87110496

約数和(自身を除く): 22289071

約数列:

[1, 5, 17, 25, 43, 85, 215, 425, 731, 1075, 3547, 3655, 17735, 18275, 60299, 88675, 152521, 301495, 762605, 1507475, 2592857, 3813025, 12964285, 64821425]

約数ペア:

[(1, 64821425), (5, 12964285), (17, 3813025), (25, 2592857), (43, 1507475), (85, 762605), (215, 301495), (425, 152521), (731, 88675), (1075, 60299), (3547, 18275), (3655, 17735)]