16640000

素因数分解:

$2^{11}\times 5^4\times {\mathrm{13}}^1$

素因数の和:55

約数の個数: 120

約数和(自身を含む): 44774730

約数和(自身を除く): 28134730

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, 2048, 2080, 2500, 2560, 2600, 3200, 3250, 3328, 4000, 4160, 5000, 5120, 5200, 6400, 6500, 6656, 8000, 8125, 8320, 10000, 10240, 10400, 12800, 13000, 13312, 16000, 16250, 16640, 20000, 20800, 25600, 26000, 26624, 32000, 32500, 33280, 40000, 41600, 51200, 52000, 64000, 65000, 66560, 80000, 83200, 104000, 128000, 130000, 133120, 160000, 166400, 208000, 256000, 260000, 320000, 332800, 416000, 520000, 640000, 665600, 832000, 1040000, 1280000, 1664000, 2080000, 3328000, 4160000, 8320000, 16640000]

約数ペア:

[(1, 16640000), (2, 8320000), (4, 4160000), (5, 3328000), (8, 2080000), (10, 1664000), (13, 1280000), (16, 1040000), (20, 832000), (25, 665600), (26, 640000), (32, 520000), (40, 416000), (50, 332800), (52, 320000), (64, 260000), (65, 256000), (80, 208000), (100, 166400), (104, 160000), (125, 133120), (128, 130000), (130, 128000), (160, 104000), (200, 83200), (208, 80000), (250, 66560), (256, 65000), (260, 64000), (320, 52000), (325, 51200), (400, 41600), (416, 40000), (500, 33280), (512, 32500), (520, 32000), (625, 26624), (640, 26000), (650, 25600), (800, 20800), (832, 20000), (1000, 16640), (1024, 16250), (1040, 16000), (1250, 13312), (1280, 13000), (1300, 12800), (1600, 10400), (1625, 10240), (1664, 10000), (2000, 8320), (2048, 8125), (2080, 8000), (2500, 6656), (2560, 6500), (2600, 6400), (3200, 5200), (3250, 5120), (3328, 5000), (4000, 4160)]