18971225

素因数分解:

$5^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{269}}^1$

素因数の和:330

約数の個数: 48

約数和(自身を含む): 29998080

約数和(自身を除く): 11026855

約数列:

[1, 5, 7, 13, 25, 31, 35, 65, 91, 155, 175, 217, 269, 325, 403, 455, 775, 1085, 1345, 1883, 2015, 2275, 2821, 3497, 5425, 6725, 8339, 9415, 10075, 14105, 17485, 24479, 41695, 47075, 58373, 70525, 87425, 108407, 122395, 208475, 291865, 542035, 611975, 758849, 1459325, 2710175, 3794245, 18971225]

約数ペア:

[(1, 18971225), (5, 3794245), (7, 2710175), (13, 1459325), (25, 758849), (31, 611975), (35, 542035), (65, 291865), (91, 208475), (155, 122395), (175, 108407), (217, 87425), (269, 70525), (325, 58373), (403, 47075), (455, 41695), (775, 24479), (1085, 17485), (1345, 14105), (1883, 10075), (2015, 9415), (2275, 8339), (2821, 6725), (3497, 5425)]