209580

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{499}}^1$

素因数の和:518

約数の個数: 48

約数和(自身を含む): 672000

約数和(自身を除く): 462420

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 499, 998, 1497, 1996, 2495, 2994, 3493, 4990, 5988, 6986, 7485, 9980, 10479, 13972, 14970, 17465, 20958, 29940, 34930, 41916, 52395, 69860, 104790, 209580]

約数ペア:

[(1, 209580), (2, 104790), (3, 69860), (4, 52395), (5, 41916), (6, 34930), (7, 29940), (10, 20958), (12, 17465), (14, 14970), (15, 13972), (20, 10479), (21, 9980), (28, 7485), (30, 6986), (35, 5988), (42, 4990), (60, 3493), (70, 2994), (84, 2495), (105, 1996), (140, 1497), (210, 998), (420, 499)]