1628800

素因数分解:

$2^7\times 5^2\times {\mathrm{509}}^1$

素因数の和:533

約数の個数: 48

約数和(自身を含む): 4031550

約数和(自身を除く): 2402750

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 128, 160, 200, 320, 400, 509, 640, 800, 1018, 1600, 2036, 2545, 3200, 4072, 5090, 8144, 10180, 12725, 16288, 20360, 25450, 32576, 40720, 50900, 65152, 81440, 101800, 162880, 203600, 325760, 407200, 814400, 1628800]

約数ペア:

[(1, 1628800), (2, 814400), (4, 407200), (5, 325760), (8, 203600), (10, 162880), (16, 101800), (20, 81440), (25, 65152), (32, 50900), (40, 40720), (50, 32576), (64, 25450), (80, 20360), (100, 16288), (128, 12725), (160, 10180), (200, 8144), (320, 5090), (400, 4072), (509, 3200), (640, 2545), (800, 2036), (1018, 1600)]