18989721

素因数分解:

$3^7\times {\mathrm{19}}^1\times {\mathrm{457}}^1$

素因数の和:497

約数の個数: 32

約数和(自身を含む): 30044800

約数和(自身を除く): 11055079

約数列:

[1, 3, 9, 19, 27, 57, 81, 171, 243, 457, 513, 729, 1371, 1539, 2187, 4113, 4617, 8683, 12339, 13851, 26049, 37017, 41553, 78147, 111051, 234441, 333153, 703323, 999459, 2109969, 6329907, 18989721]

約数ペア:

[(1, 18989721), (3, 6329907), (9, 2109969), (19, 999459), (27, 703323), (57, 333153), (81, 234441), (171, 111051), (243, 78147), (457, 41553), (513, 37017), (729, 26049), (1371, 13851), (1539, 12339), (2187, 8683), (4113, 4617)]