19904913

素因数分解:

$3^3\times 7^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{241}}^1$

素因数の和:299

約数の個数: 64

約数和(自身を含む): 37171200

約数和(自身を除く): 17266287

約数列:

[1, 3, 7, 9, 19, 21, 23, 27, 57, 63, 69, 133, 161, 171, 189, 207, 241, 399, 437, 483, 513, 621, 723, 1197, 1311, 1449, 1687, 2169, 3059, 3591, 3933, 4347, 4579, 5061, 5543, 6507, 9177, 11799, 13737, 15183, 16629, 27531, 32053, 38801, 41211, 45549, 49887, 82593, 96159, 105317, 116403, 123633, 149661, 288477, 315951, 349209, 737219, 865431, 947853, 1047627, 2211657, 2843559, 6634971, 19904913]

約数ペア:

[(1, 19904913), (3, 6634971), (7, 2843559), (9, 2211657), (19, 1047627), (21, 947853), (23, 865431), (27, 737219), (57, 349209), (63, 315951), (69, 288477), (133, 149661), (161, 123633), (171, 116403), (189, 105317), (207, 96159), (241, 82593), (399, 49887), (437, 45549), (483, 41211), (513, 38801), (621, 32053), (723, 27531), (1197, 16629), (1311, 15183), (1449, 13737), (1687, 11799), (2169, 9177), (3059, 6507), (3591, 5543), (3933, 5061), (4347, 4579)]