260000000

素因数分解:

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

素因数の和:64

約数の個数: 144

約数和(自身を含む): 698631024

約数和(自身を除く): 438631024

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, 520, 625, 640, 650, 800, 832, 1000, 1040, 1250, 1280, 1300, 1600, 1625, 1664, 2000, 2080, 2500, 2600, 3125, 3200, 3250, 3328, 4000, 4160, 5000, 5200, 6250, 6400, 6500, 8000, 8125, 8320, 10000, 10400, 12500, 13000, 15625, 16000, 16250, 16640, 20000, 20800, 25000, 26000, 31250, 32000, 32500, 40000, 40625, 41600, 50000, 52000, 62500, 65000, 78125, 80000, 81250, 83200, 100000, 104000, 125000, 130000, 156250, 160000, 162500, 200000, 203125, 208000, 250000, 260000, 312500, 325000, 400000, 406250, 416000, 500000, 520000, 625000, 650000, 800000, 812500, 1000000, 1015625, 1040000, 1250000, 1300000, 1625000, 2000000, 2031250, 2080000, 2500000, 2600000, 3250000, 4000000, 4062500, 5000000, 5200000, 6500000, 8125000, 10000000, 10400000, 13000000, 16250000, 20000000, 26000000, 32500000, 52000000, 65000000, 130000000, 260000000]

約数ペア:

[(1, 260000000), (2, 130000000), (4, 65000000), (5, 52000000), (8, 32500000), (10, 26000000), (13, 20000000), (16, 16250000), (20, 13000000), (25, 10400000), (26, 10000000), (32, 8125000), (40, 6500000), (50, 5200000), (52, 5000000), (64, 4062500), (65, 4000000), (80, 3250000), (100, 2600000), (104, 2500000), (125, 2080000), (128, 2031250), (130, 2000000), (160, 1625000), (200, 1300000), (208, 1250000), (250, 1040000), (256, 1015625), (260, 1000000), (320, 812500), (325, 800000), (400, 650000), (416, 625000), (500, 520000), (520, 500000), (625, 416000), (640, 406250), (650, 400000), (800, 325000), (832, 312500), (1000, 260000), (1040, 250000), (1250, 208000), (1280, 203125), (1300, 200000), (1600, 162500), (1625, 160000), (1664, 156250), (2000, 130000), (2080, 125000), (2500, 104000), (2600, 100000), (3125, 83200), (3200, 81250), (3250, 80000), (3328, 78125), (4000, 65000), (4160, 62500), (5000, 52000), (5200, 50000), (6250, 41600), (6400, 40625), (6500, 40000), (8000, 32500), (8125, 32000), (8320, 31250), (10000, 26000), (10400, 25000), (12500, 20800), (13000, 20000), (15625, 16640), (16000, 16250)]