19784988

素因数分解:

$2^2\times 3^2\times {\mathrm{43}}^1\times {\mathrm{12781}}^1$

素因数の和:12834

約数の個数: 36

約数和(自身を含む): 51179128

約数和(自身を除く): 31394140

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 36, 43, 86, 129, 172, 258, 387, 516, 774, 1548, 12781, 25562, 38343, 51124, 76686, 115029, 153372, 230058, 460116, 549583, 1099166, 1648749, 2198332, 3297498, 4946247, 6594996, 9892494, 19784988]

約数ペア:

[(1, 19784988), (2, 9892494), (3, 6594996), (4, 4946247), (6, 3297498), (9, 2198332), (12, 1648749), (18, 1099166), (36, 549583), (43, 460116), (86, 230058), (129, 153372), (172, 115029), (258, 76686), (387, 51124), (516, 38343), (774, 25562), (1548, 12781)]