64400000

素因数分解:

$2^7\times 5^5\times 7^1\times {\mathrm{23}}^1$

素因数の和:69

約数の個数: 192

約数和(自身を含む): 191237760

約数和(自身を除く): 126837760

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 23, 25, 28, 32, 35, 40, 46, 50, 56, 64, 70, 80, 92, 100, 112, 115, 125, 128, 140, 160, 161, 175, 184, 200, 224, 230, 250, 280, 320, 322, 350, 368, 400, 448, 460, 500, 560, 575, 625, 640, 644, 700, 736, 800, 805, 875, 896, 920, 1000, 1120, 1150, 1250, 1288, 1400, 1472, 1600, 1610, 1750, 1840, 2000, 2240, 2300, 2500, 2576, 2800, 2875, 2944, 3125, 3200, 3220, 3500, 3680, 4000, 4025, 4375, 4480, 4600, 5000, 5152, 5600, 5750, 6250, 6440, 7000, 7360, 8000, 8050, 8750, 9200, 10000, 10304, 11200, 11500, 12500, 12880, 14000, 14375, 14720, 16000, 16100, 17500, 18400, 20000, 20125, 20608, 21875, 22400, 23000, 25000, 25760, 28000, 28750, 32200, 35000, 36800, 40000, 40250, 43750, 46000, 50000, 51520, 56000, 57500, 64400, 70000, 71875, 73600, 80000, 80500, 87500, 92000, 100000, 100625, 103040, 112000, 115000, 128800, 140000, 143750, 161000, 175000, 184000, 200000, 201250, 230000, 257600, 280000, 287500, 322000, 350000, 368000, 400000, 402500, 460000, 503125, 515200, 560000, 575000, 644000, 700000, 805000, 920000, 1006250, 1150000, 1288000, 1400000, 1610000, 1840000, 2012500, 2300000, 2576000, 2800000, 3220000, 4025000, 4600000, 6440000, 8050000, 9200000, 12880000, 16100000, 32200000, 64400000]

約数ペア:

[(1, 64400000), (2, 32200000), (4, 16100000), (5, 12880000), (7, 9200000), (8, 8050000), (10, 6440000), (14, 4600000), (16, 4025000), (20, 3220000), (23, 2800000), (25, 2576000), (28, 2300000), (32, 2012500), (35, 1840000), (40, 1610000), (46, 1400000), (50, 1288000), (56, 1150000), (64, 1006250), (70, 920000), (80, 805000), (92, 700000), (100, 644000), (112, 575000), (115, 560000), (125, 515200), (128, 503125), (140, 460000), (160, 402500), (161, 400000), (175, 368000), (184, 350000), (200, 322000), (224, 287500), (230, 280000), (250, 257600), (280, 230000), (320, 201250), (322, 200000), (350, 184000), (368, 175000), (400, 161000), (448, 143750), (460, 140000), (500, 128800), (560, 115000), (575, 112000), (625, 103040), (640, 100625), (644, 100000), (700, 92000), (736, 87500), (800, 80500), (805, 80000), (875, 73600), (896, 71875), (920, 70000), (1000, 64400), (1120, 57500), (1150, 56000), (1250, 51520), (1288, 50000), (1400, 46000), (1472, 43750), (1600, 40250), (1610, 40000), (1750, 36800), (1840, 35000), (2000, 32200), (2240, 28750), (2300, 28000), (2500, 25760), (2576, 25000), (2800, 23000), (2875, 22400), (2944, 21875), (3125, 20608), (3200, 20125), (3220, 20000), (3500, 18400), (3680, 17500), (4000, 16100), (4025, 16000), (4375, 14720), (4480, 14375), (4600, 14000), (5000, 12880), (5152, 12500), (5600, 11500), (5750, 11200), (6250, 10304), (6440, 10000), (7000, 9200), (7360, 8750), (8000, 8050)]