21581075

素因数分解:

$5^2\times {\mathrm{17}}^2\times {\mathrm{29}}^1\times {\mathrm{103}}^1$

素因数の和:176

約数の個数: 36

約数和(自身を含む): 29693040

約数和(自身を除く): 8111965

約数列:

[1, 5, 17, 25, 29, 85, 103, 145, 289, 425, 493, 515, 725, 1445, 1751, 2465, 2575, 2987, 7225, 8381, 8755, 12325, 14935, 29767, 41905, 43775, 50779, 74675, 148835, 209525, 253895, 744175, 863243, 1269475, 4316215, 21581075]

約数ペア:

[(1, 21581075), (5, 4316215), (17, 1269475), (25, 863243), (29, 744175), (85, 253895), (103, 209525), (145, 148835), (289, 74675), (425, 50779), (493, 43775), (515, 41905), (725, 29767), (1445, 14935), (1751, 12325), (2465, 8755), (2575, 8381), (2987, 7225)]