21406020

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{197}}^1\times {\mathrm{1811}}^1$

素因数の和:2020

約数の個数: 48

約数和(自身を含む): 60274368

約数和(自身を除く): 38868348

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 197, 394, 591, 788, 985, 1182, 1811, 1970, 2364, 2955, 3622, 3940, 5433, 5910, 7244, 9055, 10866, 11820, 18110, 21732, 27165, 36220, 54330, 108660, 356767, 713534, 1070301, 1427068, 1783835, 2140602, 3567670, 4281204, 5351505, 7135340, 10703010, 21406020]

約数ペア:

[(1, 21406020), (2, 10703010), (3, 7135340), (4, 5351505), (5, 4281204), (6, 3567670), (10, 2140602), (12, 1783835), (15, 1427068), (20, 1070301), (30, 713534), (60, 356767), (197, 108660), (394, 54330), (591, 36220), (788, 27165), (985, 21732), (1182, 18110), (1811, 11820), (1970, 10866), (2364, 9055), (2955, 7244), (3622, 5910), (3940, 5433)]