72800000

素因数分解:

$2^8\times 5^5\times 7^1\times {\mathrm{13}}^1$

素因数の和:61

約数の個数: 216

約数和(自身を含む): 223548192

約数和(自身を除く): 150748192

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 16, 20, 25, 26, 28, 32, 35, 40, 50, 52, 56, 64, 65, 70, 80, 91, 100, 104, 112, 125, 128, 130, 140, 160, 175, 182, 200, 208, 224, 250, 256, 260, 280, 320, 325, 350, 364, 400, 416, 448, 455, 500, 520, 560, 625, 640, 650, 700, 728, 800, 832, 875, 896, 910, 1000, 1040, 1120, 1250, 1280, 1300, 1400, 1456, 1600, 1625, 1664, 1750, 1792, 1820, 2000, 2080, 2240, 2275, 2500, 2600, 2800, 2912, 3125, 3200, 3250, 3328, 3500, 3640, 4000, 4160, 4375, 4480, 4550, 5000, 5200, 5600, 5824, 6250, 6400, 6500, 7000, 7280, 8000, 8125, 8320, 8750, 8960, 9100, 10000, 10400, 11200, 11375, 11648, 12500, 13000, 14000, 14560, 16000, 16250, 16640, 17500, 18200, 20000, 20800, 21875, 22400, 22750, 23296, 25000, 26000, 28000, 29120, 32000, 32500, 35000, 36400, 40000, 40625, 41600, 43750, 44800, 45500, 50000, 52000, 56000, 56875, 58240, 65000, 70000, 72800, 80000, 81250, 83200, 87500, 91000, 100000, 104000, 112000, 113750, 116480, 130000, 140000, 145600, 160000, 162500, 175000, 182000, 200000, 208000, 224000, 227500, 260000, 280000, 284375, 291200, 325000, 350000, 364000, 400000, 416000, 455000, 520000, 560000, 568750, 582400, 650000, 700000, 728000, 800000, 910000, 1040000, 1120000, 1137500, 1300000, 1400000, 1456000, 1820000, 2080000, 2275000, 2600000, 2800000, 2912000, 3640000, 4550000, 5200000, 5600000, 7280000, 9100000, 10400000, 14560000, 18200000, 36400000, 72800000]

約数ペア:

[(1, 72800000), (2, 36400000), (4, 18200000), (5, 14560000), (7, 10400000), (8, 9100000), (10, 7280000), (13, 5600000), (14, 5200000), (16, 4550000), (20, 3640000), (25, 2912000), (26, 2800000), (28, 2600000), (32, 2275000), (35, 2080000), (40, 1820000), (50, 1456000), (52, 1400000), (56, 1300000), (64, 1137500), (65, 1120000), (70, 1040000), (80, 910000), (91, 800000), (100, 728000), (104, 700000), (112, 650000), (125, 582400), (128, 568750), (130, 560000), (140, 520000), (160, 455000), (175, 416000), (182, 400000), (200, 364000), (208, 350000), (224, 325000), (250, 291200), (256, 284375), (260, 280000), (280, 260000), (320, 227500), (325, 224000), (350, 208000), (364, 200000), (400, 182000), (416, 175000), (448, 162500), (455, 160000), (500, 145600), (520, 140000), (560, 130000), (625, 116480), (640, 113750), (650, 112000), (700, 104000), (728, 100000), (800, 91000), (832, 87500), (875, 83200), (896, 81250), (910, 80000), (1000, 72800), (1040, 70000), (1120, 65000), (1250, 58240), (1280, 56875), (1300, 56000), (1400, 52000), (1456, 50000), (1600, 45500), (1625, 44800), (1664, 43750), (1750, 41600), (1792, 40625), (1820, 40000), (2000, 36400), (2080, 35000), (2240, 32500), (2275, 32000), (2500, 29120), (2600, 28000), (2800, 26000), (2912, 25000), (3125, 23296), (3200, 22750), (3250, 22400), (3328, 21875), (3500, 20800), (3640, 20000), (4000, 18200), (4160, 17500), (4375, 16640), (4480, 16250), (4550, 16000), (5000, 14560), (5200, 14000), (5600, 13000), (5824, 12500), (6250, 11648), (6400, 11375), (6500, 11200), (7000, 10400), (7280, 10000), (8000, 9100), (8125, 8960), (8320, 8750)]