20851605

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{97}}^1\times {\mathrm{281}}^1$

素因数の和:406

約数の個数: 48

約数和(自身を含む): 38800944

約数和(自身を除く): 17949339

約数列:

[1, 3, 5, 9, 15, 17, 45, 51, 85, 97, 153, 255, 281, 291, 485, 765, 843, 873, 1405, 1455, 1649, 2529, 4215, 4365, 4777, 4947, 8245, 12645, 14331, 14841, 23885, 24735, 27257, 42993, 71655, 74205, 81771, 136285, 214965, 245313, 408855, 463369, 1226565, 1390107, 2316845, 4170321, 6950535, 20851605]

約数ペア:

[(1, 20851605), (3, 6950535), (5, 4170321), (9, 2316845), (15, 1390107), (17, 1226565), (45, 463369), (51, 408855), (85, 245313), (97, 214965), (153, 136285), (255, 81771), (281, 74205), (291, 71655), (485, 42993), (765, 27257), (843, 24735), (873, 23885), (1405, 14841), (1455, 14331), (1649, 12645), (2529, 8245), (4215, 4947), (4365, 4777)]