208000000

素因数分解:

$2^{10}\times 5^6\times {\mathrm{13}}^1$

素因数の和:63

約数の個数: 154

約数和(自身を含む): 559719398

約数和(自身を除く): 351719398

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 25, 26, 32, 40, 50, 52, 64, 65, 80, 100, 104, 125, 128, 130, 160, 200, 208, 250, 256, 260, 320, 325, 400, 416, 500, 512, 520, 625, 640, 650, 800, 832, 1000, 1024, 1040, 1250, 1280, 1300, 1600, 1625, 1664, 2000, 2080, 2500, 2560, 2600, 3125, 3200, 3250, 3328, 4000, 4160, 5000, 5120, 5200, 6250, 6400, 6500, 6656, 8000, 8125, 8320, 10000, 10400, 12500, 12800, 13000, 13312, 15625, 16000, 16250, 16640, 20000, 20800, 25000, 25600, 26000, 31250, 32000, 32500, 33280, 40000, 40625, 41600, 50000, 52000, 62500, 64000, 65000, 66560, 80000, 81250, 83200, 100000, 104000, 125000, 128000, 130000, 160000, 162500, 166400, 200000, 203125, 208000, 250000, 260000, 320000, 325000, 332800, 400000, 406250, 416000, 500000, 520000, 640000, 650000, 800000, 812500, 832000, 1000000, 1040000, 1300000, 1600000, 1625000, 1664000, 2000000, 2080000, 2600000, 3200000, 3250000, 4000000, 4160000, 5200000, 6500000, 8000000, 8320000, 10400000, 13000000, 16000000, 20800000, 26000000, 41600000, 52000000, 104000000, 208000000]

約数ペア:

[(1, 208000000), (2, 104000000), (4, 52000000), (5, 41600000), (8, 26000000), (10, 20800000), (13, 16000000), (16, 13000000), (20, 10400000), (25, 8320000), (26, 8000000), (32, 6500000), (40, 5200000), (50, 4160000), (52, 4000000), (64, 3250000), (65, 3200000), (80, 2600000), (100, 2080000), (104, 2000000), (125, 1664000), (128, 1625000), (130, 1600000), (160, 1300000), (200, 1040000), (208, 1000000), (250, 832000), (256, 812500), (260, 800000), (320, 650000), (325, 640000), (400, 520000), (416, 500000), (500, 416000), (512, 406250), (520, 400000), (625, 332800), (640, 325000), (650, 320000), (800, 260000), (832, 250000), (1000, 208000), (1024, 203125), (1040, 200000), (1250, 166400), (1280, 162500), (1300, 160000), (1600, 130000), (1625, 128000), (1664, 125000), (2000, 104000), (2080, 100000), (2500, 83200), (2560, 81250), (2600, 80000), (3125, 66560), (3200, 65000), (3250, 64000), (3328, 62500), (4000, 52000), (4160, 50000), (5000, 41600), (5120, 40625), (5200, 40000), (6250, 33280), (6400, 32500), (6500, 32000), (6656, 31250), (8000, 26000), (8125, 25600), (8320, 25000), (10000, 20800), (10400, 20000), (12500, 16640), (12800, 16250), (13000, 16000), (13312, 15625)]