18531639

素因数分解:

$3^3\times 7^1\times {\mathrm{71}}^1\times {\mathrm{1381}}^1$

素因数の和:1468

約数の個数: 32

約数和(自身を含む): 31841280

約数和(自身を除く): 13309641

約数列:

[1, 3, 7, 9, 21, 27, 63, 71, 189, 213, 497, 639, 1381, 1491, 1917, 4143, 4473, 9667, 12429, 13419, 29001, 37287, 87003, 98051, 261009, 294153, 686357, 882459, 2059071, 2647377, 6177213, 18531639]

約数ペア:

[(1, 18531639), (3, 6177213), (7, 2647377), (9, 2059071), (21, 882459), (27, 686357), (63, 294153), (71, 261009), (189, 98051), (213, 87003), (497, 37287), (639, 29001), (1381, 13419), (1491, 12429), (1917, 9667), (4143, 4473)]