1639180

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{1999}}^1$

素因数の和:2049

約数の個数: 24

約数和(自身を含む): 3528000

約数和(自身を除く): 1888820

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 1999, 3998, 7996, 9995, 19990, 39980, 81959, 163918, 327836, 409795, 819590, 1639180]

約数ペア:

[(1, 1639180), (2, 819590), (4, 409795), (5, 327836), (10, 163918), (20, 81959), (41, 39980), (82, 19990), (164, 9995), (205, 7996), (410, 3998), (820, 1999)]