20996500

素因数分解:

$2^2\times 5^3\times 7^2\times {\mathrm{857}}^1$

素因数の和:890

約数の個数: 72

約数和(自身を含む): 53405352

約数和(自身を除く): 32408852

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 25, 28, 35, 49, 50, 70, 98, 100, 125, 140, 175, 196, 245, 250, 350, 490, 500, 700, 857, 875, 980, 1225, 1714, 1750, 2450, 3428, 3500, 4285, 4900, 5999, 6125, 8570, 11998, 12250, 17140, 21425, 23996, 24500, 29995, 41993, 42850, 59990, 83986, 85700, 107125, 119980, 149975, 167972, 209965, 214250, 299950, 419930, 428500, 599900, 749875, 839860, 1049825, 1499750, 2099650, 2999500, 4199300, 5249125, 10498250, 20996500]

約数ペア:

[(1, 20996500), (2, 10498250), (4, 5249125), (5, 4199300), (7, 2999500), (10, 2099650), (14, 1499750), (20, 1049825), (25, 839860), (28, 749875), (35, 599900), (49, 428500), (50, 419930), (70, 299950), (98, 214250), (100, 209965), (125, 167972), (140, 149975), (175, 119980), (196, 107125), (245, 85700), (250, 83986), (350, 59990), (490, 42850), (500, 41993), (700, 29995), (857, 24500), (875, 23996), (980, 21425), (1225, 17140), (1714, 12250), (1750, 11998), (2450, 8570), (3428, 6125), (3500, 5999), (4285, 4900)]