18979947

素因数分解:

$3^3\times 7^1\times {\mathrm{233}}^1\times {\mathrm{431}}^1$

素因数の和:680

約数の個数: 32

約数和(自身を含む): 32348160

約数和(自身を除く): 13368213

約数列:

[1, 3, 7, 9, 21, 27, 63, 189, 233, 431, 699, 1293, 1631, 2097, 3017, 3879, 4893, 6291, 9051, 11637, 14679, 27153, 44037, 81459, 100423, 301269, 702961, 903807, 2108883, 2711421, 6326649, 18979947]

約数ペア:

[(1, 18979947), (3, 6326649), (7, 2711421), (9, 2108883), (21, 903807), (27, 702961), (63, 301269), (189, 100423), (233, 81459), (431, 44037), (699, 27153), (1293, 14679), (1631, 11637), (2097, 9051), (3017, 6291), (3879, 4893)]