20478400

素因数分解:

$2^6\times 5^2\times {\mathrm{12799}}^1$

素因数の和:12821

約数の個数: 42

約数和(自身を含む): 50393600

約数和(自身を除く): 29915200

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 160, 200, 320, 400, 800, 1600, 12799, 25598, 51196, 63995, 102392, 127990, 204784, 255980, 319975, 409568, 511960, 639950, 819136, 1023920, 1279900, 2047840, 2559800, 4095680, 5119600, 10239200, 20478400]

約数ペア:

[(1, 20478400), (2, 10239200), (4, 5119600), (5, 4095680), (8, 2559800), (10, 2047840), (16, 1279900), (20, 1023920), (25, 819136), (32, 639950), (40, 511960), (50, 409568), (64, 319975), (80, 255980), (100, 204784), (160, 127990), (200, 102392), (320, 63995), (400, 51196), (800, 25598), (1600, 12799)]