20494400

素因数分解:

$2^6\times 5^2\times {\mathrm{12809}}^1$

素因数の和:12831

約数の個数: 42

約数和(自身を含む): 50432970

約数和(自身を除く): 29938570

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 160, 200, 320, 400, 800, 1600, 12809, 25618, 51236, 64045, 102472, 128090, 204944, 256180, 320225, 409888, 512360, 640450, 819776, 1024720, 1280900, 2049440, 2561800, 4098880, 5123600, 10247200, 20494400]

約数ペア:

[(1, 20494400), (2, 10247200), (4, 5123600), (5, 4098880), (8, 2561800), (10, 2049440), (16, 1280900), (20, 1024720), (25, 819776), (32, 640450), (40, 512360), (50, 409888), (64, 320225), (80, 256180), (100, 204944), (160, 128090), (200, 102472), (320, 64045), (400, 51236), (800, 25618), (1600, 12809)]