6400000

素因数分解:

$2^{11}\times 5^5$

素因数の和:47

約数の個数: 72

約数和(自身を含む): 15995070

約数和(自身を除く): 9595070

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 125, 128, 160, 200, 250, 256, 320, 400, 500, 512, 625, 640, 800, 1000, 1024, 1250, 1280, 1600, 2000, 2048, 2500, 2560, 3125, 3200, 4000, 5000, 5120, 6250, 6400, 8000, 10000, 10240, 12500, 12800, 16000, 20000, 25000, 25600, 32000, 40000, 50000, 51200, 64000, 80000, 100000, 128000, 160000, 200000, 256000, 320000, 400000, 640000, 800000, 1280000, 1600000, 3200000, 6400000]

約数ペア:

[(1, 6400000), (2, 3200000), (4, 1600000), (5, 1280000), (8, 800000), (10, 640000), (16, 400000), (20, 320000), (25, 256000), (32, 200000), (40, 160000), (50, 128000), (64, 100000), (80, 80000), (100, 64000), (125, 51200), (128, 50000), (160, 40000), (200, 32000), (250, 25600), (256, 25000), (320, 20000), (400, 16000), (500, 12800), (512, 12500), (625, 10240), (640, 10000), (800, 8000), (1000, 6400), (1024, 6250), (1250, 5120), (1280, 5000), (1600, 4000), (2000, 3200), (2048, 3125), (2500, 2560)]