19983978

素因数分解:

$2^1\times 3^2\times 7^1\times {\mathrm{199}}^1\times {\mathrm{797}}^1$

素因数の和:1011

約数の個数: 48

約数和(自身を含む): 49795200

約数和(自身を除く): 29811222

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 63, 126, 199, 398, 597, 797, 1194, 1393, 1594, 1791, 2391, 2786, 3582, 4179, 4782, 5579, 7173, 8358, 11158, 12537, 14346, 16737, 25074, 33474, 50211, 100422, 158603, 317206, 475809, 951618, 1110221, 1427427, 2220442, 2854854, 3330663, 6661326, 9991989, 19983978]

約数ペア:

[(1, 19983978), (2, 9991989), (3, 6661326), (6, 3330663), (7, 2854854), (9, 2220442), (14, 1427427), (18, 1110221), (21, 951618), (42, 475809), (63, 317206), (126, 158603), (199, 100422), (398, 50211), (597, 33474), (797, 25074), (1194, 16737), (1393, 14346), (1594, 12537), (1791, 11158), (2391, 8358), (2786, 7173), (3582, 5579), (4179, 4782)]