20790987

素因数分解:

$3^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{109}}^1\times {\mathrm{293}}^1$

素因数の和:443

約数の個数: 32

約数和(自身を含む): 33116160

約数和(自身を除く): 12325173

約数列:

[1, 3, 7, 21, 31, 93, 109, 217, 293, 327, 651, 763, 879, 2051, 2289, 3379, 6153, 9083, 10137, 23653, 27249, 31937, 63581, 70959, 95811, 190743, 223559, 670677, 990047, 2970141, 6930329, 20790987]

約数ペア:

[(1, 20790987), (3, 6930329), (7, 2970141), (21, 990047), (31, 670677), (93, 223559), (109, 190743), (217, 95811), (293, 70959), (327, 63581), (651, 31937), (763, 27249), (879, 23653), (2051, 10137), (2289, 9083), (3379, 6153)]