1638400

素因数分解:

$2^{16}\times 5^2$

素因数の和:42

約数の個数: 51

約数和(自身を含む): 4063201

約数和(自身を除く): 2424801

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 128, 160, 200, 256, 320, 400, 512, 640, 800, 1024, 1280, 1600, 2048, 2560, 3200, 4096, 5120, 6400, 8192, 10240, 12800, 16384, 20480, 25600, 32768, 40960, 51200, 65536, 81920, 102400, 163840, 204800, 327680, 409600, 819200, 1638400]

約数ペア:

[(1, 1638400), (2, 819200), (4, 409600), (5, 327680), (8, 204800), (10, 163840), (16, 102400), (20, 81920), (25, 65536), (32, 51200), (40, 40960), (50, 32768), (64, 25600), (80, 20480), (100, 16384), (128, 12800), (160, 10240), (200, 8192), (256, 6400), (320, 5120), (400, 4096), (512, 3200), (640, 2560), (800, 2048), (1024, 1600)]