20347965

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{37}}^1\times {\mathrm{101}}^1$

素因数の和:171

約数の個数: 72

約数和(自身を含む): 40209624

約数和(自身を除く): 19861659

約数列:

[1, 3, 5, 9, 11, 15, 33, 37, 45, 55, 99, 101, 111, 121, 165, 185, 303, 333, 363, 407, 495, 505, 555, 605, 909, 1089, 1111, 1221, 1515, 1665, 1815, 2035, 3333, 3663, 3737, 4477, 4545, 5445, 5555, 6105, 9999, 11211, 12221, 13431, 16665, 18315, 18685, 22385, 33633, 36663, 40293, 41107, 49995, 56055, 61105, 67155, 109989, 123321, 168165, 183315, 201465, 205535, 369963, 452177, 549945, 616605, 1356531, 1849815, 2260885, 4069593, 6782655, 20347965]

約数ペア:

[(1, 20347965), (3, 6782655), (5, 4069593), (9, 2260885), (11, 1849815), (15, 1356531), (33, 616605), (37, 549945), (45, 452177), (55, 369963), (99, 205535), (101, 201465), (111, 183315), (121, 168165), (165, 123321), (185, 109989), (303, 67155), (333, 61105), (363, 56055), (407, 49995), (495, 41107), (505, 40293), (555, 36663), (605, 33633), (909, 22385), (1089, 18685), (1111, 18315), (1221, 16665), (1515, 13431), (1665, 12221), (1815, 11211), (2035, 9999), (3333, 6105), (3663, 5555), (3737, 5445), (4477, 4545)]