20865255

素因数分解:

$3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{197}}^1\times {\mathrm{307}}^1$

素因数の和:535

約数の個数: 32

約数和(自身を含む): 35126784

約数和(自身を除く): 14261529

約数列:

[1, 3, 5, 15, 23, 69, 115, 197, 307, 345, 591, 921, 985, 1535, 2955, 4531, 4605, 7061, 13593, 21183, 22655, 35305, 60479, 67965, 105915, 181437, 302395, 907185, 1391017, 4173051, 6955085, 20865255]

約数ペア:

[(1, 20865255), (3, 6955085), (5, 4173051), (15, 1391017), (23, 907185), (69, 302395), (115, 181437), (197, 105915), (307, 67965), (345, 60479), (591, 35305), (921, 22655), (985, 21183), (1535, 13593), (2955, 7061), (4531, 4605)]