18780849

素因数分解:

$3^3\times {\mathrm{71}}^1\times {\mathrm{97}}^1\times {\mathrm{101}}^1$

素因数の和:278

約数の個数: 32

約数和(自身を含む): 28788480

約数和(自身を除く): 10007631

約数列:

[1, 3, 9, 27, 71, 97, 101, 213, 291, 303, 639, 873, 909, 1917, 2619, 2727, 6887, 7171, 9797, 20661, 21513, 29391, 61983, 64539, 88173, 185949, 193617, 264519, 695587, 2086761, 6260283, 18780849]

約数ペア:

[(1, 18780849), (3, 6260283), (9, 2086761), (27, 695587), (71, 264519), (97, 193617), (101, 185949), (213, 88173), (291, 64539), (303, 61983), (639, 29391), (873, 21513), (909, 20661), (1917, 9797), (2619, 7171), (2727, 6887)]