21287820

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{197}}^1\times {\mathrm{1801}}^1$

素因数の和:2010

約数の個数: 48

約数和(自身を含む): 59941728

約数和(自身を除く): 38653908

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 197, 394, 591, 788, 985, 1182, 1801, 1970, 2364, 2955, 3602, 3940, 5403, 5910, 7204, 9005, 10806, 11820, 18010, 21612, 27015, 36020, 54030, 108060, 354797, 709594, 1064391, 1419188, 1773985, 2128782, 3547970, 4257564, 5321955, 7095940, 10643910, 21287820]

約数ペア:

[(1, 21287820), (2, 10643910), (3, 7095940), (4, 5321955), (5, 4257564), (6, 3547970), (10, 2128782), (12, 1773985), (15, 1419188), (20, 1064391), (30, 709594), (60, 354797), (197, 108060), (394, 54030), (591, 36020), (788, 27015), (985, 21612), (1182, 18010), (1801, 11820), (1970, 10806), (2364, 9005), (2955, 7204), (3602, 5910), (3940, 5403)]