20398518

素因数分解:

$2^1\times 3^2\times 7^1\times {\mathrm{97}}^1\times {\mathrm{1669}}^1$

素因数の和:1781

約数の個数: 48

約数和(自身を含む): 51061920

約数和(自身を除く): 30663402

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 63, 97, 126, 194, 291, 582, 679, 873, 1358, 1669, 1746, 2037, 3338, 4074, 5007, 6111, 10014, 11683, 12222, 15021, 23366, 30042, 35049, 70098, 105147, 161893, 210294, 323786, 485679, 971358, 1133251, 1457037, 2266502, 2914074, 3399753, 6799506, 10199259, 20398518]

約数ペア:

[(1, 20398518), (2, 10199259), (3, 6799506), (6, 3399753), (7, 2914074), (9, 2266502), (14, 1457037), (18, 1133251), (21, 971358), (42, 485679), (63, 323786), (97, 210294), (126, 161893), (194, 105147), (291, 70098), (582, 35049), (679, 30042), (873, 23366), (1358, 15021), (1669, 12222), (1746, 11683), (2037, 10014), (3338, 6111), (4074, 5007)]