19997112

素因数分解:

$2^3\times 3^1\times {\mathrm{53}}^1\times {\mathrm{79}}^1\times {\mathrm{199}}^1$

素因数の和:340

約数の個数: 64

約数和(自身を含む): 51840000

約数和(自身を除く): 31842888

約数列:

[1, 2, 3, 4, 6, 8, 12, 24, 53, 79, 106, 158, 159, 199, 212, 237, 316, 318, 398, 424, 474, 597, 632, 636, 796, 948, 1194, 1272, 1592, 1896, 2388, 4187, 4776, 8374, 10547, 12561, 15721, 16748, 21094, 25122, 31442, 31641, 33496, 42188, 47163, 50244, 62884, 63282, 84376, 94326, 100488, 125768, 126564, 188652, 253128, 377304, 833213, 1666426, 2499639, 3332852, 4999278, 6665704, 9998556, 19997112]

約数ペア:

[(1, 19997112), (2, 9998556), (3, 6665704), (4, 4999278), (6, 3332852), (8, 2499639), (12, 1666426), (24, 833213), (53, 377304), (79, 253128), (106, 188652), (158, 126564), (159, 125768), (199, 100488), (212, 94326), (237, 84376), (316, 63282), (318, 62884), (398, 50244), (424, 47163), (474, 42188), (597, 33496), (632, 31641), (636, 31442), (796, 25122), (948, 21094), (1194, 16748), (1272, 15721), (1592, 12561), (1896, 10547), (2388, 8374), (4187, 4776)]