20520459

素因数分解:

$3^4\times {\mathrm{37}}^1\times {\mathrm{41}}^1\times {\mathrm{167}}^1$

素因数の和:257

約数の個数: 40

約数和(自身を含む): 32443488

約数和(自身を除く): 11923029

約数列:

[1, 3, 9, 27, 37, 41, 81, 111, 123, 167, 333, 369, 501, 999, 1107, 1503, 1517, 2997, 3321, 4509, 4551, 6179, 6847, 13527, 13653, 18537, 20541, 40959, 55611, 61623, 122877, 166833, 184869, 253339, 500499, 554607, 760017, 2280051, 6840153, 20520459]

約数ペア:

[(1, 20520459), (3, 6840153), (9, 2280051), (27, 760017), (37, 554607), (41, 500499), (81, 253339), (111, 184869), (123, 166833), (167, 122877), (333, 61623), (369, 55611), (501, 40959), (999, 20541), (1107, 18537), (1503, 13653), (1517, 13527), (2997, 6847), (3321, 6179), (4509, 4551)]