18861219

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{163}}^1$

素因数の和:248

約数の個数: 48

約数和(自身を含む): 31519488

約数和(自身を除く): 12658269

約数列:

[1, 3, 9, 13, 23, 39, 43, 69, 117, 129, 163, 207, 299, 387, 489, 559, 897, 989, 1467, 1677, 2119, 2691, 2967, 3749, 5031, 6357, 7009, 8901, 11247, 12857, 19071, 21027, 33741, 38571, 48737, 63081, 91117, 115713, 146211, 161207, 273351, 438633, 483621, 820053, 1450863, 2095691, 6287073, 18861219]

約数ペア:

[(1, 18861219), (3, 6287073), (9, 2095691), (13, 1450863), (23, 820053), (39, 483621), (43, 438633), (69, 273351), (117, 161207), (129, 146211), (163, 115713), (207, 91117), (299, 63081), (387, 48737), (489, 38571), (559, 33741), (897, 21027), (989, 19071), (1467, 12857), (1677, 11247), (2119, 8901), (2691, 7009), (2967, 6357), (3749, 5031)]