20759480

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{151}}^1\times {\mathrm{491}}^1$

素因数の和:660

約数の個数: 64

約数和(自身を含む): 53844480

約数和(自身を除く): 33085000

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 151, 280, 302, 491, 604, 755, 982, 1057, 1208, 1510, 1964, 2114, 2455, 3020, 3437, 3928, 4228, 4910, 5285, 6040, 6874, 8456, 9820, 10570, 13748, 17185, 19640, 21140, 27496, 34370, 42280, 68740, 74141, 137480, 148282, 296564, 370705, 518987, 593128, 741410, 1037974, 1482820, 2075948, 2594935, 2965640, 4151896, 5189870, 10379740, 20759480]

約数ペア:

[(1, 20759480), (2, 10379740), (4, 5189870), (5, 4151896), (7, 2965640), (8, 2594935), (10, 2075948), (14, 1482820), (20, 1037974), (28, 741410), (35, 593128), (40, 518987), (56, 370705), (70, 296564), (140, 148282), (151, 137480), (280, 74141), (302, 68740), (491, 42280), (604, 34370), (755, 27496), (982, 21140), (1057, 19640), (1208, 17185), (1510, 13748), (1964, 10570), (2114, 9820), (2455, 8456), (3020, 6874), (3437, 6040), (3928, 5285), (4228, 4910)]