19981143

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{787}}^1$

素因数の和:844

約数の個数: 48

約数和(自身を含む): 36714496

約数和(自身を除く): 16733353

約数列:

[1, 3, 7, 9, 13, 21, 31, 39, 63, 91, 93, 117, 217, 273, 279, 403, 651, 787, 819, 1209, 1953, 2361, 2821, 3627, 5509, 7083, 8463, 10231, 16527, 24397, 25389, 30693, 49581, 71617, 73191, 92079, 170779, 214851, 219573, 317161, 512337, 644553, 951483, 1537011, 2220127, 2854449, 6660381, 19981143]

約数ペア:

[(1, 19981143), (3, 6660381), (7, 2854449), (9, 2220127), (13, 1537011), (21, 951483), (31, 644553), (39, 512337), (63, 317161), (91, 219573), (93, 214851), (117, 170779), (217, 92079), (273, 73191), (279, 71617), (403, 49581), (651, 30693), (787, 25389), (819, 24397), (1209, 16527), (1953, 10231), (2361, 8463), (2821, 7083), (3627, 5509)]