20746845

素因数分解:

$3^2\times 5^1\times 7^2\times {\mathrm{97}}^2$

素因数の和:219

約数の個数: 54

約数和(自身を含む): 42268122

約数和(自身を除く): 21521277

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 49, 63, 97, 105, 147, 245, 291, 315, 441, 485, 679, 735, 873, 1455, 2037, 2205, 3395, 4365, 4753, 6111, 9409, 10185, 14259, 23765, 28227, 30555, 42777, 47045, 65863, 71295, 84681, 141135, 197589, 213885, 329315, 423405, 461041, 592767, 987945, 1383123, 2305205, 2963835, 4149369, 6915615, 20746845]

約数ペア:

[(1, 20746845), (3, 6915615), (5, 4149369), (7, 2963835), (9, 2305205), (15, 1383123), (21, 987945), (35, 592767), (45, 461041), (49, 423405), (63, 329315), (97, 213885), (105, 197589), (147, 141135), (245, 84681), (291, 71295), (315, 65863), (441, 47045), (485, 42777), (679, 30555), (735, 28227), (873, 23765), (1455, 14259), (2037, 10185), (2205, 9409), (3395, 6111), (4365, 4753)]