20161250949

素因数分解:

$3^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{131}}^1\times {\mathrm{55103}}^1$

素因数の和:55270

約数の個数: 48

約数和(自身を含む): 33168199680

約数和(自身を除く): 13006948731

約数列:

[1, 3, 7, 19, 21, 49, 57, 131, 133, 147, 393, 399, 917, 931, 2489, 2751, 2793, 6419, 7467, 17423, 19257, 52269, 55103, 121961, 165309, 365883, 385721, 1046957, 1157163, 2700047, 3140871, 7218493, 7328699, 8100141, 21655479, 21986097, 50529451, 51300893, 137151367, 151588353, 153902679, 353706157, 411454101, 960059569, 1061118471, 2880178707, 6720416983, 20161250949]

約数ペア:

[(1, 20161250949), (3, 6720416983), (7, 2880178707), (19, 1061118471), (21, 960059569), (49, 411454101), (57, 353706157), (131, 153902679), (133, 151588353), (147, 137151367), (393, 51300893), (399, 50529451), (917, 21986097), (931, 21655479), (2489, 8100141), (2751, 7328699), (2793, 7218493), (6419, 3140871), (7467, 2700047), (17423, 1157163), (19257, 1046957), (52269, 385721), (55103, 365883), (121961, 165309)]