21507912

素因数分解:

$2^3\times 3^2\times {\mathrm{43}}^1\times {\mathrm{6947}}^1$

素因数の和:7002

約数の個数: 48

約数和(自身を含む): 59613840

約数和(自身を除く): 38105928

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, 43, 72, 86, 129, 172, 258, 344, 387, 516, 774, 1032, 1548, 3096, 6947, 13894, 20841, 27788, 41682, 55576, 62523, 83364, 125046, 166728, 250092, 298721, 500184, 597442, 896163, 1194884, 1792326, 2389768, 2688489, 3584652, 5376978, 7169304, 10753956, 21507912]

約数ペア:

[(1, 21507912), (2, 10753956), (3, 7169304), (4, 5376978), (6, 3584652), (8, 2688489), (9, 2389768), (12, 1792326), (18, 1194884), (24, 896163), (36, 597442), (43, 500184), (72, 298721), (86, 250092), (129, 166728), (172, 125046), (258, 83364), (344, 62523), (387, 55576), (516, 41682), (774, 27788), (1032, 20841), (1548, 13894), (3096, 6947)]