21258575

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{149}}^1\times {\mathrm{439}}^1$

素因数の和:611

約数の個数: 24

約数和(自身を含む): 28644000

約数和(自身を除く): 7385425

約数列:

[1, 5, 13, 25, 65, 149, 325, 439, 745, 1937, 2195, 3725, 5707, 9685, 10975, 28535, 48425, 65411, 142675, 327055, 850343, 1635275, 4251715, 21258575]

約数ペア:

[(1, 21258575), (5, 4251715), (13, 1635275), (25, 850343), (65, 327055), (149, 142675), (325, 65411), (439, 48425), (745, 28535), (1937, 10975), (2195, 9685), (3725, 5707)]