638680225

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{941}}^1\times {\mathrm{1597}}^1$

素因数の和:2565

約数の個数: 24

約数和(自身を含む): 839966328

約数和(自身を除く): 201286103

約数列:

[1, 5, 17, 25, 85, 425, 941, 1597, 4705, 7985, 15997, 23525, 27149, 39925, 79985, 135745, 399925, 678725, 1502777, 7513885, 25547209, 37569425, 127736045, 638680225]

約数ペア:

[(1, 638680225), (5, 127736045), (17, 37569425), (25, 25547209), (85, 7513885), (425, 1502777), (941, 678725), (1597, 399925), (4705, 135745), (7985, 79985), (15997, 39925), (23525, 27149)]