20631325

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{199}}^1$

素因数の和:262

約数の個数: 48

約数和(自身を含む): 31248000

約数和(自身を除く): 10616675

約数列:

[1, 5, 11, 13, 25, 29, 55, 65, 143, 145, 199, 275, 319, 325, 377, 715, 725, 995, 1595, 1885, 2189, 2587, 3575, 4147, 4975, 5771, 7975, 9425, 10945, 12935, 20735, 28457, 28855, 54725, 63481, 64675, 75023, 103675, 142285, 144275, 317405, 375115, 711425, 825253, 1587025, 1875575, 4126265, 20631325]

約数ペア:

[(1, 20631325), (5, 4126265), (11, 1875575), (13, 1587025), (25, 825253), (29, 711425), (55, 375115), (65, 317405), (143, 144275), (145, 142285), (199, 103675), (275, 75023), (319, 64675), (325, 63481), (377, 54725), (715, 28855), (725, 28457), (995, 20735), (1595, 12935), (1885, 10945), (2189, 9425), (2587, 7975), (3575, 5771), (4147, 4975)]