3991491

素因数分解:

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

素因数の和:461

約数の個数: 32

約数和(自身を含む): 6912000

約数和(自身を除く): 2920509

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 147, 189, 343, 431, 441, 1029, 1293, 1323, 3017, 3087, 3879, 9051, 9261, 11637, 21119, 27153, 63357, 81459, 147833, 190071, 443499, 570213, 1330497, 3991491]

約数ペア:

[(1, 3991491), (3, 1330497), (7, 570213), (9, 443499), (21, 190071), (27, 147833), (49, 81459), (63, 63357), (147, 27153), (189, 21119), (343, 11637), (431, 9261), (441, 9051), (1029, 3879), (1293, 3087), (1323, 3017)]