18691075

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{17}}^2\times {\mathrm{199}}^1$

素因数の和:256

約数の個数: 36

約数和(自身を含む): 26647600

約数和(自身を除く): 7956525

約数列:

[1, 5, 13, 17, 25, 65, 85, 199, 221, 289, 325, 425, 995, 1105, 1445, 2587, 3383, 3757, 4975, 5525, 7225, 12935, 16915, 18785, 43979, 57511, 64675, 84575, 93925, 219895, 287555, 747643, 1099475, 1437775, 3738215, 18691075]

約数ペア:

[(1, 18691075), (5, 3738215), (13, 1437775), (17, 1099475), (25, 747643), (65, 287555), (85, 219895), (199, 93925), (221, 84575), (289, 64675), (325, 57511), (425, 43979), (995, 18785), (1105, 16915), (1445, 12935), (2587, 7225), (3383, 5525), (3757, 4975)]