1991555487

素因数分解:

$3^2\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{277}}^1\times {\mathrm{739}}^1$

素因数の和:1092

約数の個数: 48

約数和(自身を含む): 3080862720

約数和(自身を除く): 1089307233

約数列:

[1, 3, 9, 23, 47, 69, 141, 207, 277, 423, 739, 831, 1081, 2217, 2493, 3243, 6371, 6651, 9729, 13019, 16997, 19113, 34733, 39057, 50991, 57339, 104199, 117171, 152973, 204703, 299437, 312597, 614109, 798859, 898311, 1842327, 2396577, 2694933, 4708169, 7189731, 9621041, 14124507, 28863123, 42373521, 86589369, 221283943, 663851829, 1991555487]

約数ペア:

[(1, 1991555487), (3, 663851829), (9, 221283943), (23, 86589369), (47, 42373521), (69, 28863123), (141, 14124507), (207, 9621041), (277, 7189731), (423, 4708169), (739, 2694933), (831, 2396577), (1081, 1842327), (2217, 898311), (2493, 798859), (3243, 614109), (6371, 312597), (6651, 299437), (9729, 204703), (13019, 152973), (16997, 117171), (19113, 104199), (34733, 57339), (39057, 50991)]