20645120000

素因数分解:

$2^{11}\times 5^4\times {\mathrm{127}}^2$

素因数の和:296

約数の個数: 180

約数和(自身を含む): 51993056115

約数和(自身を除く): 31347936115

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 125, 127, 128, 160, 200, 250, 254, 256, 320, 400, 500, 508, 512, 625, 635, 640, 800, 1000, 1016, 1024, 1250, 1270, 1280, 1600, 2000, 2032, 2048, 2500, 2540, 2560, 3175, 3200, 4000, 4064, 5000, 5080, 5120, 6350, 6400, 8000, 8128, 10000, 10160, 10240, 12700, 12800, 15875, 16000, 16129, 16256, 20000, 20320, 25400, 25600, 31750, 32000, 32258, 32512, 40000, 40640, 50800, 51200, 63500, 64000, 64516, 65024, 79375, 80000, 80645, 81280, 101600, 127000, 128000, 129032, 130048, 158750, 160000, 161290, 162560, 203200, 254000, 256000, 258064, 260096, 317500, 320000, 322580, 325120, 403225, 406400, 508000, 516128, 635000, 640000, 645160, 650240, 806450, 812800, 1016000, 1032256, 1270000, 1280000, 1290320, 1300480, 1612900, 1625600, 2016125, 2032000, 2064512, 2540000, 2580640, 3225800, 3251200, 4032250, 4064000, 4129024, 5080000, 5161280, 6451600, 6502400, 8064500, 8128000, 8258048, 10080625, 10160000, 10322560, 12903200, 16129000, 16256000, 16516096, 20161250, 20320000, 20645120, 25806400, 32258000, 32512000, 33032192, 40322500, 40640000, 41290240, 51612800, 64516000, 80645000, 81280000, 82580480, 103225600, 129032000, 161290000, 162560000, 165160960, 206451200, 258064000, 322580000, 412902400, 516128000, 645160000, 825804800, 1032256000, 1290320000, 2064512000, 2580640000, 4129024000, 5161280000, 10322560000, 20645120000]

約数ペア:

[(1, 20645120000), (2, 10322560000), (4, 5161280000), (5, 4129024000), (8, 2580640000), (10, 2064512000), (16, 1290320000), (20, 1032256000), (25, 825804800), (32, 645160000), (40, 516128000), (50, 412902400), (64, 322580000), (80, 258064000), (100, 206451200), (125, 165160960), (127, 162560000), (128, 161290000), (160, 129032000), (200, 103225600), (250, 82580480), (254, 81280000), (256, 80645000), (320, 64516000), (400, 51612800), (500, 41290240), (508, 40640000), (512, 40322500), (625, 33032192), (635, 32512000), (640, 32258000), (800, 25806400), (1000, 20645120), (1016, 20320000), (1024, 20161250), (1250, 16516096), (1270, 16256000), (1280, 16129000), (1600, 12903200), (2000, 10322560), (2032, 10160000), (2048, 10080625), (2500, 8258048), (2540, 8128000), (2560, 8064500), (3175, 6502400), (3200, 6451600), (4000, 5161280), (4064, 5080000), (5000, 4129024), (5080, 4064000), (5120, 4032250), (6350, 3251200), (6400, 3225800), (8000, 2580640), (8128, 2540000), (10000, 2064512), (10160, 2032000), (10240, 2016125), (12700, 1625600), (12800, 1612900), (15875, 1300480), (16000, 1290320), (16129, 1280000), (16256, 1270000), (20000, 1032256), (20320, 1016000), (25400, 812800), (25600, 806450), (31750, 650240), (32000, 645160), (32258, 640000), (32512, 635000), (40000, 516128), (40640, 508000), (50800, 406400), (51200, 403225), (63500, 325120), (64000, 322580), (64516, 320000), (65024, 317500), (79375, 260096), (80000, 258064), (80645, 256000), (81280, 254000), (101600, 203200), (127000, 162560), (128000, 161290), (129032, 160000), (130048, 158750)]