19718811

素因数分解:

$3^2\times 7^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{251}}^1$

素因数の和:336

約数の個数: 48

約数和(自身を含む): 34594560

約数和(自身を除く): 14875749

約数列:

[1, 3, 7, 9, 21, 29, 43, 63, 87, 129, 203, 251, 261, 301, 387, 609, 753, 903, 1247, 1757, 1827, 2259, 2709, 3741, 5271, 7279, 8729, 10793, 11223, 15813, 21837, 26187, 32379, 50953, 65511, 75551, 78561, 97137, 152859, 226653, 312997, 458577, 679959, 938991, 2190979, 2816973, 6572937, 19718811]

約数ペア:

[(1, 19718811), (3, 6572937), (7, 2816973), (9, 2190979), (21, 938991), (29, 679959), (43, 458577), (63, 312997), (87, 226653), (129, 152859), (203, 97137), (251, 78561), (261, 75551), (301, 65511), (387, 50953), (609, 32379), (753, 26187), (903, 21837), (1247, 15813), (1757, 11223), (1827, 10793), (2259, 8729), (2709, 7279), (3741, 5271)]