19864971

素因数分解:

$3^2\times 7^1\times {\mathrm{29}}^1\times {\mathrm{83}}^1\times {\mathrm{131}}^1$

素因数の和:256

約数の個数: 48

約数和(自身を含む): 34594560

約数和(自身を除く): 14729589

約数列:

[1, 3, 7, 9, 21, 29, 63, 83, 87, 131, 203, 249, 261, 393, 581, 609, 747, 917, 1179, 1743, 1827, 2407, 2751, 3799, 5229, 7221, 8253, 10873, 11397, 16849, 21663, 26593, 32619, 34191, 50547, 76111, 79779, 97857, 151641, 228333, 239337, 315317, 684999, 945951, 2207219, 2837853, 6621657, 19864971]

約数ペア:

[(1, 19864971), (3, 6621657), (7, 2837853), (9, 2207219), (21, 945951), (29, 684999), (63, 315317), (83, 239337), (87, 228333), (131, 151641), (203, 97857), (249, 79779), (261, 76111), (393, 50547), (581, 34191), (609, 32619), (747, 26593), (917, 21663), (1179, 16849), (1743, 11397), (1827, 10873), (2407, 8253), (2751, 7221), (3799, 5229)]